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8:15–8:30: Opening Remarks MON.1: Ultrafast Processes in Photosynthesis Time: Monday, 8:30–10:15 Location: Festsaal Invited MON.1.1 8:30 Taking Snapshots of Reaction Intermediates in Metalloenzymes and Catalysts with X-ray Techniques — ∙Junko Yano — Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA e development of XFELs has opened up opportunities for studying the dy- namics of biological systems. We have used X-ray diffraction and spectroscopy methods to study photochemical activation of the water oxidation reaction of Photosystem II. Oral MON.1.2 9:00 Femtosecond Nonadiabatic Dynamics in Photosynthetic Light Harvesting — Peter W. Foster, Vivek Tiwari, William K. Peters, and ∙David. M. Jonas — Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215 USA Fast and efficient energy transfer in photosynthetic antennas supports all life on earth. Nonadiabatic energy transfer drives unusual vibrations through tight cou- pling with electronic motion. Polarization dependent vibrational motion drives polarization independent femtosecond energy transfer. Oral MON.1.3 9:15 ltrafast Energy Transfer Signatures in Qx band of Bacterial Reaction Center — ∙Arkaprabha Konar, Riley Sechrist, and Jennifer P. Ogilvie — Univer- sity of Michigan, Ann Arbor, MI, USA Two-dimensional electronic spectroscopy (2DES) employing broadband near- IR pump and visible continuum probe is used to investigate the early events in bacterial photosynthesis. Excitation wavelength resolution of cofactor Qx bands reveal spectral signatures of upper P exciton and ultrafast inter-exciton energy transfer. Oral MON.1.4 9:30 ltrabroadband Two-Dimensional Electronic Spectroscopy Reveals Energy Transfer Pathways of LHCII over the Entire Visible Spectrum — ∙Minjung Son 1 , Alberta Pinnola 2 , Roberto Bassi 2,3 , and Gabriela S. Schlau- Cohen 1 — 1 Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, Massachusetts 02139, USA — 2 Dipartimento di Biotecnologie, Università di Verona, Strada Le Grazie 15, I-37134, Italy — 3 Consiglio Nazionale delle Ricerche (CNR), Istituto per la Protezione delle Pi- ante (IPP), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Firenze, Italy We utilize ultrabroadband two-dimensional electronic spectroscopy to map out pathways of energy flow in LHCII across the entire visible region. Our re- sults reveal additional energy transfer pathways involving chlorophyll Q x and carotenoid excited states. Oral MON.1.5 9:45 Spectroscopy and Dynamics in Light-Harvesting Systems — Roel Tempelaar 1 , Jasper Knoester 2 , and ∙Thomas Jansen 2 — 1 Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, USA — 2 Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AG Groningen, e Netherlands Simulated two-dimensional electronic spectroscopy of light-harvesting systems are presented and compared with experiments. Strategies for correctly interpret- ing the spectra and extracting ultrafast dynamical information as the electronic coherence times and exciton dynamics are discussed. Oral MON.1.6 10:00 Lack of Long-Lived Quantum Coherence in the Photosynthetic Energy Transfer — Hong-Guang Duan 1,2,3 , Valentyn I. Prokhorenko 1 , Richard Cogdell 4 , Khuram Ashraf 4 , Amy L. Stevens 1,3,5,6 , Emilie Wientjes 7 , Roberta Croce 7 , ∙Michael Thorwart 2,3 , and R.J. Dw ayne Miller 1,3,5,6 — 1 Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany — 2 I. Institut für eoretische Physik, Universität Hamburg, Jungiustraße 9, 20355 Hamburg, Germany — 3 e Ham- burg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Ger- many — 4 Institute of Molecular, Cell, and Systems Biology, College of Medical, Veterinary, and Life Science, University of Glasgow, Glasgow G12 8QQ, United Kingdom — 5 Department of Chemistry, University of Toronto, Toronto, ON, Canada M5S 3H6 — 6 Department of Physics, University of Toronto, Toronto, ON, Canada M5S 3H6 — 7 Department of Physics and Astronomy and Institute for Lasers, Life and Biophotonics, Faculty of Sciences, VU University Amster- dam, De Boelelaan, 1081, 1081, HV, Amsterdam, e Netherlands We have studied the FMO, LHCII and PSII reaction center complex by electronic 2D spectroscopy. At ambient temperature the electronic coherences are too short lived to play any functional role in the natural energy transfer. 10:15–10:45: EXHIBITION AND COFFEE BREAK kindly sponsored by European XFEL MON.2: High Harmonic Generation and Applications Time: Monday, 10:45–12:30 Location: Festsaal Invited MON.2.1 10:45 New physical insight gained in condensed matter with attosecond transient absorption spectroscopy — ∙Ursula Keller 1 , F. Schlaepfer 1 , M. Volkov 1 , S.A. Sato 2 , M. Lucchini 1 , L. Gallmann 1 , and A. Rubio 2 — 1 Physics De- partment, ETH Zurich, 8093 Zurich, Switzerland — 2 eory Department, Max Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Ger- many Aſter a general introduction in this invited talk I will discuss in more details some recent results from our group in diamond, GaAs and Ti-metal Oral MON.2.2 11:15 e Molecular Attoclock: Sub-cycle Control of Electronic Dynamics during H 2 Double Ionization — ∙Václav Hanus 1 , Sarayoo Kangaparambil 1 , Seyedreza Larimian 1 , Xinhua Xie 1 , Markus Schöffler 2 , André Staudte 3 , Gerhard Paulus 4 , Andrius Baltuska 1 , and Markus Kitzler 1 — 1 Photonics Institute, Technische Universität Wien, Gusshausstrasse 27, 1040 Wien, Austria — 2 Institut für Kernphysik, J.W. Goethe-Universität, Max-von- Laue-Strasse 1, 60438 Frankfurt am Main, Germany — 3 Joint Attosecond Sci- ence Lab. of the National Research Council and the University of Ottawa, 100 Sussex Drive, Ottawa, Ontario, — 4 Friedrich-Schiller-Universität Jena, Max- Wien-Platz 1, 07743 Jena, Germany We introduce and employ the molecular attoclock method. is allows us to simultaneously trace the nuclear and electron dynamics during H 2 fragmenta- tion, and to CEP-control the two-electron emission dynamics on sub-cycle time scales. Oral MON.2.3 11:30 Circular Dichroism in High Harmonic Generation from Chiral Molecules — Yoichi Harada, Eisuke Haraguchi, Keisuke Kaneshima, and ∙Taro Sekikawa — Hokkaido University, Sapporo, Japan Circularly polarized high harmonic generation from a chiral molecule was found to significantly depend both on the chirality and on the rotating direction of the circularly polarized counter-rotating two-color driving laser fields. Oral MON.2.4 11:45 Enhanced Solid-State High-Harmonic Generation from an all-dielectric Metasurface — Hanzhe Liu 1,2 , Cheng Guo 3,4 , Giulio Vampa 1 , Jingyuan Zhang 3,4 , Tomas Sarmiento 4,5 , Meng Xiao 4 , Philip Bucksbaum 1,2,3,6 , Je- lena Vučković 3,4,5 , Shanhui Fan 3,4,5 , and ∙David Reis 1,3,6 — 1 Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, Califor- nia, 94025, USA — 2 Department of Physics, Stanford University, Stanford, Cal- ifornia, 94305, USA — 3 Department of Applied Physics, Stanford University, Stanford, California, 94305, USA — 4 E. L. Ginzton Laboratory, Stanford Univer- sity, Stanford, California 94305, USA — 5 Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA — 6 Department of Photon Science, Stanford University, Stanford, California 94305, USA
Transcript

  • 8:15–8:30: Opening Remarks

    MON.1: Ultrafast Processes in Photosynthesis

    Time: Monday, 8:30–10:15 Location: Festsaal

    Invited MON.1.1 8:30Taking Snapshots ofReaction Intermediates inMetalloenzymes andCatalystswithX-ray Techniques— ∙JunkoYano—Molecular Biophysics and IntegratedBioimagingDivision, Lawrence BerkeleyNational Laboratory, 1CyclotronRoad,Berkeley, CA 94720, USAThe development of XFELs has opened up opportunities for studying the dy-namics of biological systems. We have used X-ray diffraction and spectroscopymethods to study photochemical activation of the water oxidation reaction ofPhotosystem II.

    Oral MON.1.2 9:00FemtosecondNonadiabatic Dynamics in Photosynthetic Light Harvesting—PeterW. Foster, Vivek Tiwari, William K. Peters, and ∙David. M. Jonas—Department of Chemistry and Biochemistry, University of Colorado, Boulder,CO 80309-0215 USAFast and efficient energy transfer in photosynthetic antennas supports all life onearth. Nonadiabatic energy transfer drives unusual vibrations through tight cou-pling with electronic motion. Polarization dependent vibrational motion drivespolarization independent femtosecond energy transfer.

    Oral MON.1.3 9:15Ultrafast Energy Transfer Signatures inQx band of Bacterial ReactionCenter— ∙ArkaprabhaKonar, Riley Sechrist, and Jennifer P. Ogilvie—Univer-sity of Michigan, Ann Arbor, MI, USATwo-dimensional electronic spectroscopy (2DES) employing broadband near-IR pump and visible continuum probe is used to investigate the early events inbacterial photosynthesis. Excitation wavelength resolution of cofactor Qx bandsreveal spectral signatures of upper P exciton and ultrafast inter-exciton energytransfer.

    Oral MON.1.4 9:30Ultrabroadband Two-Dimensional Electronic Spectroscopy Reveals EnergyTransfer Pathways of LHCII over the Entire Visible Spectrum — ∙MinjungSon1, Alberta Pinnola2, Roberto Bassi2,3, and Gabriela S. Schlau-Cohen1 — 1Department of Chemistry, Massachusetts Institute of Technology,77Massachusetts Ave, Cambridge, Massachusetts 02139, USA— 2Dipartimentodi Biotecnologie, Università di Verona, Strada Le Grazie 15, I-37134, Italy —3Consiglio Nazionale delle Ricerche (CNR), Istituto per la Protezione delle Pi-ante (IPP), Via Madonna del Piano 10, 50019, Sesto Fiorentino, Firenze, Italy

    We utilize ultrabroadband two-dimensional electronic spectroscopy to map outpathways of energy flow in LHCII across the entire visible region. Our re-sults reveal additional energy transfer pathways involving chlorophyll Qx andcarotenoid excited states.

    Oral MON.1.5 9:45Spectroscopy and Dynamics in Light-Harvesting Systems — RoelTempelaar1, Jasper Knoester2, and ∙Thomas Jansen2 — 1Department ofChemistry, Columbia University, 3000 Broadway, New York, New York 10027,USA — 2Zernike Institute for Advanced Materials, University of Groningen,Nijenborgh 4, 9747AG Groningen,The NetherlandsSimulated two-dimensional electronic spectroscopy of light-harvesting systemsare presented and compared with experiments. Strategies for correctly interpret-ing the spectra and extracting ultrafast dynamical information as the electroniccoherence times and exciton dynamics are discussed.

    Oral MON.1.6 10:00Lack of Long-Lived Quantum Coherence in the Photosynthetic EnergyTransfer— Hong-Guang Duan1,2,3, Valentyn I. Prokhorenko1, RichardCogdell4, Khuram Ashraf4, Amy L. Stevens1,3,5,6, Emilie Wientjes7,Roberta Croce7, ∙Michael Thorwart2,3, and R.J. Dwayne Miller1,3,5,6— 1Max Planck Institute for the Structure and Dynamics of Matter, LuruperChaussee 149, 22761 Hamburg, Germany— 2I. Institut fürTheoretische Physik,Universität Hamburg, Jungiustraße 9, 20355 Hamburg, Germany — 3The Ham-burg Center for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Ger-many — 4Institute of Molecular, Cell, and Systems Biology, College of Medical,Veterinary, and Life Science, University of Glasgow, Glasgow G12 8QQ, UnitedKingdom — 5Department of Chemistry, University of Toronto, Toronto, ON,Canada M5S 3H6 — 6Department of Physics, University of Toronto, Toronto,ON, Canada M5S 3H6 — 7Department of Physics and Astronomy and Institutefor Lasers, Life and Biophotonics, Faculty of Sciences, VU University Amster-dam, De Boelelaan, 1081, 1081, HV, Amsterdam,The NetherlandsWe have studied the FMO, LHCII and PSII reaction center complex by electronic2D spectroscopy. At ambient temperature the electronic coherences are too shortlived to play any functional role in the natural energy transfer.

    10:15–10:45: EXHIBITION AND COFFEE BREAK kindly sponsored by European XFEL

    MON.2: High Harmonic Generation and Applications

    Time: Monday, 10:45–12:30 Location: Festsaal

    Invited MON.2.1 10:45New physical insight gained in condensed matter with attosecond transientabsorption spectroscopy— ∙Ursula Keller1, F. Schlaepfer1, M. Volkov1,S.A. Sato2, M. Lucchini1, L. Gallmann1, and A. Rubio2 — 1Physics De-partment, ETH Zurich, 8093 Zurich, Switzerland — 2Theory Department, MaxPlanck Institute for the Structure andDynamics ofMatter, 22761Hamburg, Ger-manyAfter a general introduction in this invited talk I will discuss inmore details somerecent results from our group in diamond, GaAs and Ti-metal

    Oral MON.2.2 11:15The Molecular Attoclock: Sub-cycle Control of Electronic Dynamics duringH2 Double Ionization — ∙Václav Hanus1, Sarayoo Kangaparambil1,Seyedreza Larimian1, Xinhua Xie1, Markus Schöffler2, AndréStaudte3, Gerhard Paulus4, Andrius Baltuska1, and Markus Kitzler1— 1Photonics Institute, Technische Universität Wien, Gusshausstrasse 27, 1040Wien, Austria — 2Institut für Kernphysik, J.W. Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany — 3Joint Attosecond Sci-ence Lab. of the National Research Council and the University of Ottawa, 100Sussex Drive, Ottawa, Ontario, — 4Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, GermanyWe introduce and employ the molecular attoclock method. This allows us tosimultaneously trace the nuclear and electron dynamics during H2 fragmenta-

    tion, and to CEP-control the two-electron emission dynamics on sub-cycle timescales.

    Oral MON.2.3 11:30Circular Dichroism in High Harmonic Generation from Chiral Molecules— Yoichi Harada, Eisuke Haraguchi, Keisuke Kaneshima, and ∙TaroSekikawa—Hokkaido University, Sapporo, JapanCircularly polarized high harmonic generation from a chiral molecule was foundto significantly depend both on the chirality and on the rotating direction of thecircularly polarized counter-rotating two-color driving laser fields.

    Oral MON.2.4 11:45Enhanced Solid-State High-Harmonic Generation from an all-dielectricMetasurface — Hanzhe Liu1,2, Cheng Guo3,4, Giulio Vampa1, JingyuanZhang3,4, Tomas Sarmiento4,5, Meng Xiao4, Philip Bucksbaum1,2,3,6, Je-lena Vučković3,4,5, Shanhui Fan3,4,5, and ∙David Reis1,3,6 — 1StanfordPULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, Califor-nia, 94025, USA — 2Department of Physics, Stanford University, Stanford, Cal-ifornia, 94305, USA — 3Department of Applied Physics, Stanford University,Stanford, California, 94305, USA— 4E. L. Ginzton Laboratory, Stanford Univer-sity, Stanford, California 94305, USA— 5Department of Electrical Engineering,StanfordUniversity, Stanford, California 94305, USA — 6Department of PhotonScience, Stanford University, Stanford, California 94305, USA

  • We report resonantly enhanced non-perturbative high-harmonic emission bymore than two orders of magnitude from a Si metasurface that possesses a Fano-like resonance resulting from a classical analog of electromagnetically inducedtransparency.

    Oral MON.2.5 12:00Broadband Extreme Ultraviolet Interferometry and Imaging — ∙G. S.Matthijs Jansen1,2, Anne C. C. de Beurs1,2, Kevin Liu1,2, Kjeld S. E.Eikema1,2, and Stefan Witte1,2 — 1Advanced Research Center for Nano-lithography, Science Park 110, 1098 XG Amsterdam, The Netherlands —2Department of Physics and Astronomy, and Laserlab, Vrije Universiteit, DeBoelelaan 1081 HV Amsterdam,The NetherlandsUsing a pair of phase-locked high-harmonic generation sources, we demonstrateextreme ultraviolet Fourier transform interferometry. This enables a wide rangeof spatially and spectrally resolved measurements at extreme ultraviolet wave-

    lengths.

    Oral MON.2.6 12:15HHG probing of atomic dipoles by electronic wave-packet caustics —∙Davide Faccialà1, Stefan Pabst2,3, Barry D. Bruner4, Anna G.Ciriolo1,5, Michele Devetta1, Matteo Negro1, Hadas Soifer4, NiritDudovich4, Salvatore Stagira5, and Caterina Vozzi1 — 1Istituto di Fo-tonica e Nanotecnologie, CNR, Milan, Italy — 2Stanford PULSE Institute, SLACNational Accelerator Laboratory, Menlo Park (CA), USA — 3ITAMP Harvard-Smithsonian Center for Astrophysics, Cambridge (MA), USA — 4Departmentof Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel— 5Dipartimento di Fisica, Politecnico di Milano, Milan, ItalyWe exploit high-order harmonic spectroscopy at caustics for assessing the role ofthe electronic wave-packet enhancement in the xenon giant resonance. Resultsin argon show that this technique can be also applied to other targets.

    MON.3A: Pulse Characterization Methods

    Time: Monday, 14:00–15:45 Location: Festsaal

    Oral MON.3A.1 14:00In-situ measurement of the full electric field of octave-spanning light pulseswith carrier-envelope phase d-scan — ∙Miguel Miranda1,2, FranciscoSilva2,3, Lana Neoricic1, Rosa Romero2,3, Paulo Guerreiro2,3, MiguelCanhota2, Hans Koop4, Vladimir Pervak4, Anne L’Huillier1, Cord L.Arnold1, Inigo J. Sola5, and Helder Crespo2 — 1Department of Physics,LundUniversity, P.O. Box 118, SE-221 00 Lund, Sweden— 2IFIMUP-IN andDe-partamento de Física e Astronomia, Universidade do Porto, Rua do Campo Ale-gre 687, 4169-007 Porto, Portugal — 3Sphere Ultrafast Photonics, S.A., Parquede Ciencia e Tecnologia U.P., R. do Campo Alegre 1021, Edificio FC6, 4169-007Porto, Portugal — 4UltraFast Innovations GmbH, Am Coulombwall 1, 85748Garching, Germany — 5Grupo de Aplicaciones del Laser y Fotonica, Dep. deFisica Aplicada, Univ. Salamanca, Pl. de la Merced s/n, E-37008 Salamanca,SpainWe demonstrate the generation and in-situ measurement of the electric field andCEP of intense near-single-cycle laser pulses using the new optical technique ofCEP dispersion-scan.

    Oral MON.3A.2 14:15Tracing the Phase of Focused Broadband Laser Pulses — ∙Dominik Hoff1,Michael Krüger2,4, Lothar Maisenbacher3, A. Max Sayler1, PeterHommelhoff4, and Gerhard G. Paulus1 — 1Helmholtz-Institut Jena andInstitut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena,Max-Wien-Platz 1, D-07743 Jena, Germany— 2Department of Physics of Com-plex Systems,Weizmann Institute of Science, 234Herzl St., Rehovot 76100, Israel— 3Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748Garching, Germany — 4Department Physik, Friedrich-Alexander-UniversitätErlangen-Nürnberg (FAU), Staudtstr. 1, D-91058 Erlangen, GermanyWe present a three-dimensional measurement of the local focal phase in a fo-cused broadband Gaussian laser beam and find strong deviations from the com-monly assumed Gouy phase, with wide ramifications for ultrafast physics.

    Oral MON.3A.3 14:30Direct Sampling of a Light Wave using Tunnelling Ionization — ∙KyungTaec Kim1,2, Wosik Cho1,2, Sueng Beom Park1, Kyungseung Kim1, SungIn Hwang1, Igor A Ivanov1, and Chang Hee Nam1,2 — 1Center for Rela-tivistic Laser Science, Institute for Basic Science (IBS), Gwangju 61005, Korea—2Department of Physics and Photon Science, Gwangju Institute of Science andTechnology, Gwangju 61005, KoreaWe report a new laser pulse characterization method in which tunneling ioniza-tion in air is used as a temporal gate.The method can be applied for wavelengthslonger than 200 nm, regardless of the duration.

    Oral MON.3A.4 14:45Spectrally resolved wavefront characterization of broadband ultrafast high-harmonic pulses — G. S. Matthijs Jansen1,2, Lars Freisem1,2, DenisRudolf1,2, Kjeld S. E. Eikema1,2, and ∙Stefan Witte1,2 — 1Advanced Re-search Center for Nanolithography, Amsterdam,The Netherlands— 2Vrije Uni-versiteit, Amsterdam,The Netherlands

    We demonstrate a sensor that measures wavefronts of multiple extreme ultra-violet wavelengths simultaneously. Wavefronts of up to nine high harmonics at25-49 nm wavelength are retrieved, and ultrafast spatiotemporal couplings canbe characterized.

    Oral MON.3A.5 15:00Complete Temporal Characterisation of Attosecond SXR Pulses Generatedby MIR Laser Sources — ∙Thomas Gaumnitz, Arohi Jain, Yoann Pertot,MartinHuppert, Inga Jordan, FernandoArdana-Lamas, andHans JakobWörner — ETH Zürich, Laboratory of Physical Chemistry, Vladimir-Prelog-Weg 2, CH-8049 Zürich, SwitzerlandIsolated 43-attosecond pulses are generated from passively CEP-stable few-cycleMIR pulses. As-streaking is used to sample the laser field and to characterizeSXR supercontinua reaching 180eV. Multi-line VTGPA is used for reconstruc-tion with highest fidelity.

    Oral MON.3A.6 15:15Direct measurement of pulse duration and frequency chirp of a seededXUV Free Electron Laser — ∙Armin Azima1, Joern Bödewadt2, OliverBecker1, StefanDüsterer2, Nagitha Ekanayake2, Rosen Ivanov2, MehdiM Kazemi2, Leslie Lamberto Lazzarino1, Christoph Lechner1, BastianManschwetus2, Theophilos Maltezopoulos4, Velizar Miltchev1, JostMüller2, Tim Plath3, Andreas Przystawik2, Marek Wieland1, RalphAssmann2, Ingmar Hartl2, Tim Laarmann2,5, Jörg Rossbach1, WilfriedWurth1,2, and Markus Drescher1,5 — 1Universität Hamburg, Institut fürExperimentalphysik, Luruper Chaussee 149, 22761 Hamburg, Germany —2Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Ger-many — 3Zentrum für Synchrotronstrahlung, Technische Universität Dort-mund, Maria-Goeppert-Mayer Straße 2, 44221 Dortmund — 4XFEL GmbH,Holzkoppel 4, 22869 Schenefeld, Germany — 5The Hamburg Centre for Ultra-fast Imaging CUI, 22761 Hamburg, GermanyWe report on a direct time-domain measurement of pulse duration and chirp ofa seeded free-electron laser pulse of the sFLASH experiment at FLASH in theXUV spectral range utilizing the THz streak camera technology.

    Oral MON.3A.7 15:30Widely Tunable Cavity-Enhanced Ultrafast Spectroscopy — Myles C.Silfies1, Yuning Chen1, Henry Timmers2, Abijith S. Kowligy2, AlexLind2,3, ScottA.Diddams2,3, and ∙ThomasK.Allison1— 1StonyBrookUni-versity, Stony Brook, USA — 2National Institute of Standards and Technology,Boulder, USA — 3University of Colorado, Boulder, USAGeneration of widely tunable frequency combs in the UV, visible, and infrared isdiscussed for use in cavity-enhanced transient absorption spectroscopy on gas-phase clusters. Progress towards cavity-enhanced two-dimensional spectroscopyis also presented.

  • MON.3B: Ultrafast Spin Dynamics

    Time: Monday, 14:00–15:45 Location: Spiegelsaal

    Oral MON.3B.1 14:00Towards Time-Resolved Nanoscale Magnetic Imaging with Circularly-Polarized High-Order Harmonics — ∙Ofer Kfir1,2, Sergey Zayko1,Christina Nolte3, Marcel Möller1, Murat Sivis1, Birgit Hebler4, SriSai Phani Kanth Arekapudi4, Daniel Steil3, Sascha Schäfer1, Man-fred Albrecht4, Oren Cohen2, Stefan Mathias3,5, and Claus Ropers1,5— 1University of Göttingen, 4th Physical Institute, Göttingen 37077, Germany— 2Solid State Institute and Physics Department, Technion – Israel Institute ofTechnology, Haifa 32000, Israel — 3University of Göttingen, 1st Physical Insti-tute, Göttingen 37077, Germany— 4Institute of Physics, University of Augsburg,Augsburg 86159, Germany— 5International Center for Advanced Studies of En-ergy Conversion (ICASEC), University of Göttingen, GermanyWe demonstrate nanoscale magnetic imaging using high-harmonics – the miss-ing step for magnetic movies with femtosecond and nanometric resolution.

    Oral MON.3B.2 14:15Critical behavior within 20fs drives the out-of-equilibrium laser-inducedmagnetic phase transition in Nickel — ∙Phoebe Tengdin1, Wenjing You1,Cong Chen1, Xun Shi1, Dmitriy Zusin1, Yingchao Zhang1, ChristianGentry1, Adam Blonsky1, Mark Keller2, Peter Oppeneer3, HenryKapteyn1, Margaret Murnane1, and Zhensheng Tao1 — 1Department ofPhysics and JILA, University of Colorado and NIST, Boulder, Colorado 80309,United States — 2National Institute of Standards and Technology (NIST), 325Broadway, Boulder, Colorado 80305, United States — 3Department of Physicsand Astronomy, Uppsala University, Box 516, 75120 Uppsala, SwedenWe show that the same critical behavior that dominates magnetic phase tran-sitions under equilibrium conditions also governs the ultrafast magnetic phasetransition in nickel, on an exceptionally fast timescale of 20fs.

    Oral MON.3B.3 14:30Directly Probing Femtosecond Spin Dynamics in a Molecular Magnet— ∙J.Olof Johansson1, Ji-Wan Kim2, Emily Allwright1, David M. Rogers1,Neil Robertson1, and Jean-Yves Bigot2 — 1EaStCHEM School of Chem-istry, University of Edinburgh, Edinburgh, UK— 2University of Strasbourg andCNRS, IPCMS, Strasbourg, FranceTime-resolved Faraday rotation was used to observe spin dynamics in V-CrPrussian blue molecular magnets. Results demonstrate intersystem crossing inless than 250 fs and open up possibilities to study dynamics in molecular mag-nets.

    Oral MON.3B.4 14:45Excitation and control of spin waves in 𝐹𝑒𝐵𝑂3 by a strong-field THz pulse— ∙Anne-Laure Calendron1,2,3, Emma Kueny1,3,4, Liwei Song1,2, Gio-vanni Cirmi1,2,3, Lars Bocklage1,3, Franz X. Kärtner1,2,3,4,5, and RalfRöhlsberger1,3 — 1Deutsches Elektronen-Synchrotron (DESY), Notkestrasse85, 22607 Hamburg, Germany — 2Center for Free-Electron Laser Science,Notkestrasse 85, 22607 Hamburg, Germany — 3The Hamburg Centre for Ul-trafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Ham-burg, Germany — 44 Department of Physics, University of Hamburg, LuruperChaussee 149, 22761 Hamburg, Germany — 5Research Laboratory of Electron-ics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,USA

    The dynamically resolved response of the canted-antiferromagnet𝐹𝑒𝐵𝑂3 excitednear a magnon resonance shows fast oscillations after THz-excitation, followedby the magnons’ intrinsic relaxation, enabling to probe transient magnetic relax-ation dynamics over large frequency range.

    Oral MON.3B.5 15:00Mapping spin correlations with hard X-ray free electron laser — ∙YinpengZhong—Max-Planck institute for the structure and dynamics of matter, Luru-per chaussee 149, D- 22761 Hamburg, GermanyTime resolved X-ray-diffraction from Ga_0.91 Mn_0.09 As was measured withthe X-ray free-electron-laser. We observe the influence of phonons by spin or-ders, which may bring a method for mapping the spin correlations in low dopedmagnetic systems.

    Oral MON.3B.6 15:15Probing Time-resolved Magnetization Dynamics in Rare-earth Ferromag-nets using High-flux Soft X-ray Source — ∙Guangyu Fan1, KatherineLégaré2, Vincent Cardin2, Edgar Kaksis1, Giedrius Andriukaitis1,Xinghua Xie1, Audrius Pugzlys1, Bruno Schmidt2,3, Jean-PierreWolf4, Francois Légaré2, Jan Lüning5, Andrius Baltuska1, and TadasBalciunas1,4 — 1Institute of Photonics, TU Wien, Gusshausstrasse 27/387,Vienna, Austria — 2Institut National de la Recherche Scientifique, Varennes,Quebec J3X1S2, Canada — 3few-cycle, Inc., 2890 Rue de Beaurivage, Montreal,Quebec H1L 5W5, Canada — 4GAP-Biophotonics, Université de Genève, 1205Geneva, Switzerland— 5Université Pierre et Marie Curie, LCPMR, UMR CNRS7614, 75005 Paris, FranceWe present for the first time for a table-top system, measurement of magnetiza-tion dynamics in terbium at the N-edge at 155 eV with fs temporal resolutionusing high flux HHG source reaching 220eV driven directly by a

  • Oral MON.4A.3 17:00Probing Charge Density Wave Dynamics in Superconducting YBCO via Ul-trafast X-Ray Scattering — ∙Scott Wandel1, Fabio Boschini2,3, Eduardoda Silva Neto2,3,4, Grant Welch1, Matthew Seaberg1, Jake Koralek1,Georgi Dakovski1, Will Hettel1, Ming-Fu Lin1, Stefan Moeller1,Ryan Coffee1, Robert Kaindl5, Ruixing Liang2,3, Doug Bonn2,3, Wal-ter Hardy2,3, MikeMinitti1, David Hawthorn6, Andrea Damascelli2,3,ClaudioGiannetti7, Joshua Turner1, and Giacomo Coslovich1— 1LinacCoherent Light Source, SLACNational Accelerator Laboratory,Menlo Park, Cal-ifornia 94025, USA — 2Department of Physics and Astronomy, University ofBritish Columbia, Vancouver, V6T 1Z4, Canada — 3Quantum Matter Institute,University of British Columbia, Vancouver, V6T 1Z4, Canada — 4Departmentof Physics, University of California, Davis, California 95616, USA — 5MaterialsSciences Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, USA — 6Department of Physics and Astronomy, University of Water-loo, Waterloo, N2L 3G1, Canada — 7Department of Mathematics and Physics,Università Cattolica del Sacro Cuore, Brescia, BS I-25121, ItalyWe report optical pump–soft x-ray scattering probe studies of YBCO single crys-tals.The experiments reveal a picosecond relaxation dynamics of charge densitywaves, which is in turn strongly modified by the onset of superconductivity.

    Oral MON.4A.4 17:15Pressure tuning of light-induced superconductivity in 𝐾3𝐶60 — ∙MicheleBuzzi1, Alice Cantaluppi1, Gregor Jotzu1, Matteo Mitrano1, DanieleNicoletti1, Stefan Kaiser1, Andrea Perucchi2, Stefano Lupi3, Paola DiPietro2, Daniele Pontiroli4, Mauro Ricco’4, Stephen R. Clark5, DieterJaksch6, and Andrea Cavalleri1,6 — 1Max Planck Institute for the Struc-ture and Dynamics of Matter, Hamburg, Germany — 2INSTM UdR Trieste-STand Elettra - Sincrotrone Trieste S.C.p.A., Basovizza, Trieste, Italy — 3CNR-IOM and Dipartimento di Fisica, Università di Roma “Sapienza”, Roma, Italy —4Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Parma,Parma, Italy — 5Department of Physics, University of Bath, Claverton Down,Bath, United Kingdom — 6Department of Physics, Oxford University, Claren-don Laboratory, Oxford, United KingdomWe report on a light-induced superconducting-like state in 𝐾3𝐶60, induced byphoto-excitation of an on-ball molecular mode. External pressure quenches thephoto-induced state validating that the transient-optical properties are the sig-nature of a transient superconductor.

    Oral MON.4A.5 17:30Collapse of high-Tc superconductivity via ultrafast quenching of phase co-herence — ∙Fabio Boschini1,2, Elia Razzoli1,2, Eduardo H. da SilvaNeto1,2,3,4, Marta Zonno1,2, Ryan P. Day1,2, MatteoMichiardi1,2, GendaD. Gu5, Arthur K. Mills1,2, Giorgio Levy1,2, David J. Jones1,2, Clau-dio Giannetti6,7, and Andrea Damascelli1,2 — 1Department of Physics &Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada— 2Quantum Matter Institute, University of British Columbia, Vancouver, BCV6T 1Z4, Canada — 3Max Planck Institute for Solid State Research, Heisen-bergstrasse 1, D-70569 Stuttgard, Germany — 4Department of Physics, Univer-sity of California, Davis, CA 95616, USA — 5Condensed Matter Physics andMaterials Science, Brookhaven National Laboratory, Upton, NY 11973, USA —6Department of Mathematics and Physics, Università Cattolica del Sacro Cuore,Brescia, BS I-25121, Italy — 7Interdisciplinary Laboratories for Advanced Ma-terials Physics (ILAMP), Università Cattolica del Sacro Cuore, Brescia I-25121,Italy

    We exploit TR-ARPES to drive and probe the phase fragility in cuprate supercon-ductors not affecting the electron pairing.This work demonstrates the dominantrole of phase coherence in the emergence of high-temperature superconductivityin copper-oxides.

    Oral MON.4A.6 17:45On the photo-inducedmonoclinic metal phase of vanadium dioxide—Mar-tin Otto1, Laurent René de Cotret1, David Valverde-Chavez1, Ku-nal Tiwari1, Nicolas Emond2, Mohamed Chaker2, David Cooke1, and∙Bradley Siwick1,3— 1Department of Physics, Center for the Physics of Mate-rials, McGill University, 3600 University Street, Montreal, QC, CA, — 2InstitutNational de la Recherche Scientifique, Centre Énergie Matriaux et Télécom-munications, Université du Québec, Varennes, Quebec J3X 1S2, Canada. —3Department of Chemistry, McGill University, 801 Sherbrooke Street W, Mon-treal, QC, CAWe combined ultrafast electron diffraction and time-resolved THz spectroscopyto unravel the photo-induced insulator-metal transitions in VO2. We deter-mined the structure of the monoclinic metallic phase and relate the fluence-dependent multi-phase character to the conductivity.

    Oral MON.4A.7 18:00Universal nature of the ultrafast magnetic phase transition in nickel re-vealed by correlating EUVMOKE andARPES spectroscopies— ∙ZhenshengTao1, Wenjing You1, Phoebe Tengdin1, Cong Chen1, Xun Shi1, DmitriyZusin1, Yingchao Zhang1, Christian Gentry1, Adam Blonsky1, MarkKeller2, Peter Openeer3, Henry Kapteyn1, and Margaret Murnane1— 1Department of Physics and JILA, University of Colorado and NIST, Boul-der, Colorado 80309, United States — 2National Institute of Standards andTechnology (NIST), 325 Broadway, Boulder, Colorado 80305, United States —3Department of Physics andAstronomy, Uppsala University, Box 516, 75120Up-psala, SwedenWe investigate ultrafast demagnetization in Ni using multiple high-harmonicspectroscopies, to reveal the universal nature of the laser-induced magneticphase transition. We uncover two competing recovery channels with distincttimescales, suggesting a phase coexistence.

    MON.4B: Advances in 2D-Spectroscopy

    Time: Monday, 16:15–18:15 Location: Spiegelsaal

    Oral MON.4B.1 16:15Frequency comb-based multidimensional coherent spectroscopy— ∙StevenCundiff and Bachana Lomsadze — Department of Physics, University ofMichigan, Ann Arbor, MI, USAWe present multidimensional coherent spectroscopy that utilizes frequencycombs and multi-heterodyne detection. We demonstrate its capability to mea-sure collective hyperfine resonances in atomic vapor induced by long-rangedipole-dipole interactions.

    Oral MON.4B.2 16:30Cavity-enhanced ultrafast two-dimensional spectroscopy using higher-ordermodes— ∙ThomasAllison—Stony Brook University, Stony Brook, NYU.S.AWe describe methods using frequency combs and cavities for recording two-dimensional ultrafast spectroscopy signals with high sensitivity. By couplingmultiple frequency combs to modes of an optical resonator, cavity-enhanced 2Dspectroscopy signals are naturally generated.

    Oral MON.4B.3 16:45Vibrational Interferometry Enables Single-Scan Acquisition of all 𝜒3 Multi-Dimensional Coherent Spectra— ∙Travis Autry1, Galan Moody1, CoreyMcDonald1,2, James Fraser1,3, Richard Mirin1, and Kevin Silverman1— 1National Institute of Standards and Technology, Boulder CO, USA —2Department of Physics, University of Colorado, Boulder CO, USA— 3Queen’sUniversity, Kingston ON, CanadaWe demonstrate a new method for multidimensional coherent spectroscopy ofnanostructures. We use a heterodyne technique implemented with a confo-cal microscope to record the amplitude and phase of all degenerate third-orderwave-mixing processes.

    Oral MON.4B.4 17:00Shaper-Based Infrared Spectroscopy in a Nonlinear Raman Setup —Niklas Müller, Lukas Brückner, and ∙Marcus Motzkus— Physikalisch-Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, GermanyWe present combined mid-infrared and nonlinear Raman spectroscopy in a sin-

  • gle beam setup through the flexible control by sub 10 fs pulse shaping. Hencetuneable (>2000 cm-1), narrowband (

  • Oral TUE.1.5 9:45Atomic scale electronic structure and response in attosecond photoemis-sion delays: A case study using non-centrosymmetric BiTeCl — ∙SergejNeb1, Christian Oberer1, Walter Enns1, Andreas Gebauer1,2, Nor-bert Müller1, Jan H. Dil3,4, Evgueni V. Chulkov5,6,7, Nikolay M.Kabachnik5,8,9, Pedro M. Echenique5,6,10, Andrey K. Kazansky5,6,11, Ul-rich Heinzmann1, and Walter Pfeiffer1 — 1Bielefeld University, Univer-sitätsstr. 25, 33615 Bielefeld, Germany — 2University of Kaiserslautern, Er-win Schrödinger Str. 46, 67663 Kaiserslautern, Germany — 3Paul-Scherrer-Institut, PSI, 5232 Villigen, Switzerland — 4École Polytechnique Fédérale deLausanne, Route Cantonale, 1015 Lausanne, Switzerland — 5Donostia Inter-national Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 SanSebastián, Spain — 6University of the Basque Country, 20080 San Sebastián,Spain — 7Tomsk State University, Lenin Avenue 36, 634050 Tomsk, Russia —8Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University,1(2), Leninskie gory, GSP-1, 119991Moscow, Russia— 9EuropeanXFELGmbH,Holzkoppel 4, 22869 Schenefeld, Germany — 10Centro de Física de MaterialesCFM/MPC (CSIC-UPV/EHU), Paseo de Manuel Lardizabal 5, 20018 San Se-bastián, Spain — 11IKERBASQUE, Basque Foundation for Science, Maria Diazde Haro 3, 48013 Bilbao, Spain

    Attosecond time-resolved photoemission from the differently terminated BiTeClsurfaces yield relative delays that cannot be attributed to bulk propagation effects.Instead, the atomic scale differences between both surface terminations have tobe taken into account.

    Oral TUE.1.6 10:00Electric dipole oscillation in solids characterized by Fourier transform ex-treme ultraviolet attosecond spectroscopy — Yuta Chisuga1,2, ∙HirokiMashiko1, KatsuyaOguri1, IkufumiKatayama2, Jun Takeda2, and HidekiGotoh1 — 1NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, At-sugi, Kanagawa 243-0198, Japan— 2Department of Physics, YokohamaNationalUniversity, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, JapanWe characterized electronic dipole oscillations in solids using Fourier transformextreme ultraviolet attosecond spectroscopy (FTXUV) combined with an iso-lated attosecond pulse, which reveals the electric band-structure and dopants ofsemiconductors and insulators.

    10:15–10:45: EXHIBITION AND COFFEE BREAK kindly sponsored by DESY

    TUE.2A: Dynamics in Solids II

    Time: Tuesday, 10:45–12:30 Location: Festsaal

    Invited TUE.2A.1 10:45Strong-field nonlinear phononics: a probe of the interatomic potentialof solids — ∙Alexander von Hoegen1, Roman Mankowsky1, MichaelFechner1, Michael Först1, and Andrea Cavalleri1,2 — 1Max Planck In-stitute for the Structure and Dynamics of Matter, Hamburg, Germany —2Department of Physics, Oxford University, Clarendon Laboratory, Parks Road,Oxford, United KingdomUsing resonant excitation, we drive the 19-THz A1-symmetry phonon inLiNbO3 to large amplitude and find phonon harmonics up to the fifth overtone.The time-resolved optical response is used to reconstruct the underlying inter-atomic potential.

    Oral TUE.2A.2 11:15Coherent phonon generation in extremely nonlinear regime — ∙KentoUchida1, Kohei Nagai1, Naotaka Yoshikawa1, and Koichiro Tanaka1,2— 1Department of Physics, Kyoto University, Kyoto, Japan — 2Institute for In-tegrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, JapanResponse of lattice under intense and non-resonant mid-infrared laser fieldis studied in bulk GaSe by using mid-infrared-pump and near-infrared-probespectroscopy. We observed large amplitude coherent oscillation of 𝐴1 phononmode associated with high harmonic generation, indicating the strong drivingof phonons.

    Oral TUE.2A.3 11:30Ultra-low thermal conductivity and acoustic dynamics of silicon nanostruc-tured metalattices probed using ultrafast high harmonic beams— ∙BegoñaAbad1, Travis Frazer1, Joshua Knobloch1, Jorge Nicolas Hernandez-Charpak1, Hiu Yang Cheng2,3, Alex Grede3,5, Noel Giebink3,5, ThomasMallouk2,3,6,7, PratibhaMahale7, WeinanChen3,4, YihuangXiong3,4, Is-maila Dabo3,4, Vincent Crespi2,3,4,6, Disha Talreja3, Venkat Gopalan3,4,John Badding2,3,4,6, Henry Kapteyn1, and Margaret Murnane1 —1Department of Physics and JILA, University of Colorado and NIST, Boulder,Colorado 80309, USA— 2Department of Chemistry, Pennsylvania State Univer-sity, University Park, PA 16802, USA — 3Materials Research Institute, Pennsyl-vania State University, University Park, PA 16802, USA — 4Department of Ma-terials Science and Engineering, Pennsylvania State University, University Park,PA 16802, USA — 5Department of Electrical Engineering, Pennsylvania StateUniversity, University Park, PA, 16802, USA — 6Department of Physics, Penn-sylvania State University, University Park, PA, 16802, USA — 7Department ofBiochemistry and Molecular Biology, Pennsylvania State University, UniversityPark, PA, 16802, USAWe extend ultrafast high harmonic nanometrology to probe transport and acous-tic dynamics in novel metamaterials with ≈10-50nm features. The data indicateextremely low thermal conductivity due to impeded phonon transport, with im-plications for designer thermoelectrics.

    Oral TUE.2A.4 11:45Direct observation of photo-mechanical stiffness in alkanethiol-cappedgold nanoparticles supracrystals by ultrafast small-angle electron diffrac-tion — ∙Giulia Fulvia Mancini1,2, Francesco Pennacchio3, TatianaLatychevskaia4, Javier Reguera5, Francesco Stellacci6, and FabrizioCarbone3 — 1Laboratory for Ultrafast Spectroscopy, Lausanne Center for Ul-trafast Science (LACUS), École Polytechnique Fédérale de Lausanne, CH1015Lausanne, Switzerland. — 2Paul Scherrer Institut, WSLA/210, 5232 PSI Villi-gen, Switzerland. — 3Laboratory for Ultrafast Microscopy and Electron Scat-tering, Lausanne Center for Ultrafast Science (LACUS), École PolytechniqueFédérale de Lausanne, CH-1015 Lausanne, Switzerland. — 4Physics Institute,University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland. —5CIC biomaGUNE, Paseo de Miramón 182C, 20009 Donostia-San Sebastian,Spain. Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain. —6Supramolecular Nanomaterials and Interfaces Laboratory, Institute of Materi-als, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.We demonstrate that ultrastiff bonding between nanoparticles can be engineeredby ad hoc assemblies of ligands, reaching strengths comparable to that of strongcovalent bonds. Our observation relies on femtosecond small-angle electrondiffraction.

    Oral TUE.2A.5 12:00Ultrafast Dynamic Imaging ofThermal and Acoustic Dynamics in Nanosys-tems using a Tabletop High Harmonic Source — ∙Charles Bevis1, RobertKarl1, Giulia Mancini1,2, Dennis Gardner1, Elisabeth Shanblatt1,Joshua Knobloch1, Travis Frazer1, Begoña Abad Mayor1, MichaelTanksalvala1, Christina Porter1, Daniel Adams1, Henry Kapteyn1,and Margaret Murnane1 — 1JILA, 440 UCB, University of Colorado, Boul-der, CO 80309 USA — 2Paul Scherrer Institut, WSLA/210, 5232 PSI Villigen,SwitzerlandWe demonstrate the first stroboscopic full-field EUV nanoscope using high har-monics. We image the propagation of thermal and surface acoustic waves innickel with 80nm transverse, 0.5 Å axial, and 10 fs resolution.

    Oral TUE.2A.6 12:15Optical Pump – THz Probe Response of VO2 under High Pressure —Johannes M. Braun1,2, Harald Schneider1, Manfred Helm1,2, RafalMirek3, Lynn A. Boatner4, Robert E. Marvel5, Richard F. Haglund5,and ∙Alexej Pashkin1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dres-den, Germany — 2Technische Universitaet Dresden, Dresden, Germany —3University ofWarsaw,Warsaw, Poland— 4Oak Ridge National Laboratory, OakRidge, USA — 5Vanderbilt University, Nashville, USAWe present the ultrafast THz response of VO2 under high pressures. Pump-probe signals and a photoexcitation threshold are detected even in a metallicstate. Our observations can be described as a pressure-driven Mott-Hubbardtransition.

  • TUE.2B: Novel Concepts in Pulse Generation

    Time: Tuesday, 10:45–12:30 Location: Spiegelsaal

    Oral TUE.2B.1 10:45Linearizing Nonlinear Optics— ∙Bruno E. Schmidt1, Philippe Lassonde2,Guilmot Ernotte2, Matteo Clerici3, Roberto Morandotti2, HeideIbrahim2, and François Légaré2 — 1few-cycle Inc., Montreal, Canada —2INRS-EMT, Varennes, Canada — 3University of Glasgow, School of Engineer-ing, Galsgow, UKFourier nonlinear optics merges the simplicity of linear optics with the power ofnonlinear optics to achieve a decoupling of frequencies, amplitudes and phasesin nonlinear processes - enabling first deep UV shaping at 207nm.

    Oral TUE.2B.2 11:00Generation of Sub-Two-Cycle CEP-Stable Optical Pulses at 3.5 𝜇m byMultiple-Plate Pulse Compression for High-Harmonic Generation in Crys-tals — ∙Peiyu Xia, Faming Lu, Nobuhisa Ishii, Teruto Kanai, and JiroItatani — The institute for Solid State Physics, the University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, JapanMultiple-plate pulse compression of femtosecondmid-infrared pulses is demon-strated using YAG and Si windows. With this robust compression scheme, weproduce sub-two-cycle, CEP-stable optical pulses and observe CEP-dependenthigh harmonic generation in crystals.

    Oral TUE.2B.3 11:15Multi-mJ Mid-IR Light Bullets in Air — Valentina Shumakova1, Skir-mantas Alisauskas1, Andrius Baltuska1,2, PavelMalevich1, AlexanderVoronin3,4, Alexander Mitrofanov3,4, Dmitriy Sidorov-Biryukov3,4,Alexey Zheltikov3,4,5, Daniil Kartashov6, and ∙Audrius Pugzlys1,2 —1Photonics Institute, TU Wien, Gusshausstrasse 27-387, A-1040 Vienna, Aus-tria — 2Center for Physical Sciences & Technology, Savanoriu Ave. 231 LT-02300 Vilnius, Lithuania — 3Physics Department, M.V. Lomonosov MoscowState University, 119992 Moscow, Russia — 4Russian Quantum Center, ul. No-vaya 100, Skolkovo, Moscow Region, 143025 Russia — 5Department of Physicsand Astronomy, Texas A&M University, College Station TX, 77843–4242, USA— 6Friedrich-Schiller University Jena, Max-Wien Platz 1, 07743 Jena, GermanyWe examine mid-IR light bullets generated in ambient air. Two-optical cyclepulses confined in space are generated in filamentation regime. Few-fold soli-tonic self-compression is achieved for strongly chirped mid-IR pulses

    Oral TUE.2B.4 11:30Coherent amplification of femtosecond laser pulses in optically excited fusedsilica — ∙Thomas Winkler1, Lasse Haahr-Lillevang2, Cristian Sarpe1,Bastian Zielinski1, Nadine Götte1, Arne Senftleben1, Peter Balling2,and Thomas Baumert2— 1Institute of Physics and CINSaT, University of Kas-sel, Kassel, Germany — 2Department of Physics and Astronomy, Aarhus Uni-versity, Aarhus, DenmarkWe present experimental results of light amplification in laser-excited fused sil-

    ica. Two temporally separated amplification regimes were found, being relatedto the presence of conduction band electrons and to the ultrafast formation ofexciton states.

    Oral TUE.2B.5 11:45Sub-Optical-Cycle Control of Relativistic Plasma Mirrors — FrederikBöhle1, Maïmouna Bocoum1, Adrien Denoeud2, Ludovic Chopineau2,Guillaume Blacard2, HenriVincenti2, MarieOuillé1, Magali Lozano1,Jean-Philippe Rousseau1, Aurélie Jullien1, Aline Vernier1, PeterSimon3, Tamas Nagy4,5,6, Thévenet Maxence7, Fabien Quéré2, ∙StefanHaessler1, and Rodrigo Lopez-Martens1 — 1Laboratoire d’Optique Ap-pliquée, ENSTA Paristech, Ecole Polytechnique, CNRS, Université Paris-Saclay,Palaiseau, France — 2LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay,Gif-sur-Yvette, France — 3ELI Attosecond Light Pulse Source, Szeged, Hungary— 4Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Ger-many — 5Laser Zentrum Hannover e.V., Hannover, Germany — 6Max BornInstitute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany— 7Lawrence Berkeley National Laboratory, Berkeley, CA, USAWe present experiments using a waveform-controlled 2-colour multi-cycle laserand a CEP-controlled 1.3-cycle laser to drive high-harmonic-generation andelectron emission off relativistic plasma mirrors. Both examples demonstrateattosecond control over the underlying collective electron dynamics.

    Oral TUE.2B.6 12:00Spectral meta-moments reveal hidden signatures of vortex pulses — MaxLiebmann1, Alexander Treffer1, Martin Bock1, Thomas Seiler2, JürgenJahns2, Thomas Elsaesser1, and ∙Ruediger Grunwald1 — 1Max Born In-stitute for Nonlinear Optics and Short-Pulse Spectroscopy, Berlin, Germany —2FernUniversität Hagen, Micro- and Nanophotonics, Hagen, GermanyUltrashort vortex pulses carry specific spatio-spectral signatures due to Gouyphase shift. Meta-moment analysis allows for identifying related characteristicpatterns in weakly modulated spectral maps.The method is transferable to otherfields of ultrafast spectroscopy.

    Oral TUE.2B.7 12:15Coherent control and interferometric detection of lateral beam profile by useof dual-optical vortex comb— ∙Akifumi Asahara1,2, Satoru Shoji1,2, Ken-ichi Kondo1,2, Yue Wang1,2, and Kaoru Minoshima1,2 — 1The Universityof Electro-Communications, Tokyo, Japan — 2Japan Science and TechnologyAgency, ERATO MINOSHIMA Intelligent Optical Synthesizer Project, Tokyo,JapanProof-of-principle experiments on a novel concept, a “dual-optical vortexcomb,” are performed. Coherent spatiotemporal phase control of optical ringlattice and interferometric detection of partially extracted dual-optical vortexcomb light are successfully demonstrated.

    TUE.3A: Ultrafast Biology

    Time: Tuesday, 14:00–15:45 Location: Festsaal

    Oral TUE.3A.1 14:00Interactions of RNA andWater probed by 2D-IR Spectroscopy— ∙BenjaminP. Fingerhut, Eva M. Bruening, Jakob Schauss, Torsten Siebert, andThomas Elsaesser—Max-Born-Institut für Nichtlineare Optik und Kurzzeit-spektroskopie, 12489 Berlin, GermanyCombined experimental-theoretical investigation of ultrafast hydration dynam-ics of an A-form RNA double helix in water reveals an ordered arrangementof water molecules and provides boundary conditions for the ion atmospherearound the polyanionic RNA.

    Oral TUE.3A.2 14:15Ultrafast Photorelaxation of Uracil Embedded in an RNA Strand— ∙DanielKeefer, Sebastian Reiter, and Regina de Vivie-Riedle — DepartmentChemie, Ludwig-Maximilians-Universität München, Butenandtstr. 11, 81377München, GermanyUltrafast photorelaxation of uracil can be hindered by its natural RNA environ-ment. Multiscale quantum dynamical simulations show that the wave packet canbe trapped in the photoexcited electronic state, which could potentially lead tophotodamage.

    Oral TUE.3A.3 14:30Conical intersection dynamics in pyrimidine nucleosides tracked with sub-20-fs UV pulses — ∙Rocìo Borrego-Varillas1, Artur Nenov2, Lu-cia Ganzer1, Aurelio Oriana1, Irene Conti2, Ines Delfino3, CristianManzoni1, Marco Garavelli2, and Giulio Cerullo 1 — 1. IFN-CNR,Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy — 2Dipartimento di Chimica Industriale, Università degliStudi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy — 3. Di-partimento di Scienze Ecologiche e Biologiche, Università della Tuscia, Largodell’Università snc, I-01100 Viterbo, ItalyBy combining transient absorption spectroscopy with sub-20 fs UV pulses andab-initio numerical simulations we follow the ultrafast dynamics in pyrimidinenucleosides and visualize the passage through conical intersections presiding ex-cited state deactivation.

  • Oral TUE.3A.4 14:45Intersystem crossing in thiobases proceeds by a dark intermediate state —∙Danielle Cristina Teles Ferreira1, Rocío Borrego-Varillas2, LuciaGanzer2, Bárbara Elza Nogueira Faria1, Cristian Manzoni2, SandroDe Silvestri2, Artur Nenov3, Irene Conti3, Marco Garavelli3, GiulioCerullo3, and AnaMaria de Paula1 — 1Departamento de Física, Universi-dade Federal de Minas Gerais, 31270-901 Belo Horizonte-MG, Brazil — 2IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci32, I-20133 Milano, Italy — 3Dipartimento di Chimica Industriale, Universitàdegli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy4-thiouracil is studied by transient absorption spectroscopy employing sub-20 fsUV-pulses and hybrid QM(CASPT2) / MM(AMBER) computations (static anddynamic), evidencing that, along the photoexcited relaxation pathway, intersys-tem crossing originates from a dark intermediate state.

    Oral TUE.3A.5 15:00Exction dynamics in DNA oligomers studied by broadband deep-UV tran-sient absorption spectroscopy — ∙Benjamin Bauer, Malte Oppermann,Frank vanMourik, and Majed Chergui— École Polytechnique Fédérale deLausanne, Lausanne, SwitzerlandWe report the first broadband transient absorption measurements of adeninestrands in the deep-UV (250-370 nm). By varying the strand length we resolvethe interplay between inter-base stacking and exciton formation and dynamicsin DNA oligomers.

    Oral TUE.3A.6 15:15Anabaena Sensory Rhodopsin: Effect of point mutations on PSBR photo-isomerization speed — ∙Damianos Agathangelou1, Yoelvis Orozco-Gonzalez1, Maria Del Carmen Marin2, Johanna Brazard1, HidekiKandori3, Kwang Hwan Jung4, Jérémie Léonard1, Nicolas Ferré5, Mas-simo Olivucci2,6, and StefanHaacke1 — 1Université de Strasbourg - CNRSUMR 7504, Institut de Physique et Chimie des Matériaux de Strasbourg, Stras-bourg 67034, France— 2Department of Biotechnology, Chemistry & Pharmacy,Università di Siena,2, I-53100 Siena, Italy — 3Department of Frontiers Mate-rials, Nagoya Institute of Technology, Showa-ku, Nagoya 466-8555, Japan —4Department of Life Science and Institute of Biological Interfaces, Sogang Uni-versity, South Korea — 5Aix-Marseille Université, CNRS, ICR, 13284 Marseille,France — 6Department of Chemistry, Bowling Green State University, BowlingGreen, Ohio 43403, United States

    We report experimental results on the ultrafast photo-isomerization of the ASRs-PSBR where point mutations lead to an up to 7-fold increase of the photo-isomerization speed, correlated with the absorption maxima shift

    Oral TUE.3A.7 15:30Mapping the Ultrafast Vibrational Dynamics of all-Trans and 13-Cis Reti-nal Isomerization in Anabaena Sensory Rhodopsin — ∙Partha Roy1,Rei Yoshizumi2, Hideki Kandori2, and Tiago Buckup1 — 1Physikalisch-Chemisches Institut, Ruprecht-Karls Universitat Heidelberg, D-69210, Heidel-berg, Germany — 2Department of Life Science and Applied Chemistry, NagoyaInstitute of Technology, JapanThe ground and excited state evolution of fingerprint vibrational modes of all-trans-and 13-cis-retinal are mapped by impulsive vibrational spectroscopy. All-trans-retinal shows slower frequency shift dynamics in the excited state in com-parison to 13-cis-retinal.

    TUE.3B: Graphene and Semiconductors

    Time: Tuesday, 14:00–15:45 Location: Spiegelsaal

    Oral TUE.3B.1 14:00Lightwave-controlled ElectronDynamics inGraphene — ∙ChristianHeide,TakuyaHiguchi, Konrad Ullmann, Heiko B. Weber, and PeterHommel-hoff — Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Staudt-strasse 1, D-91058 Erlangen, GermanyCurrents induced in graphene by ultrashort laser pulses are sensitive to theelectric-field waveform. We found a transition of light–matter interaction fromthe weak-field to the strong-field regime, where intraband dynamics influenceinterband transitions.

    Oral TUE.3B.2 14:15Ultrafast heat dynamics in graphene and van der Waals heterostructures—∙Klaas-Jan Tielrooij1, Andrea Tomadin2, SamM. Hornett3, Niels C.H.Hesp1, Alessandro Principi4, Euan Hendry3, Marco Polini2, and FrankH.L. Koppens1 — 1ICFO – the Institute of Photonic Sciences, Barcelona In-stitute of Science and Technology, Castelldefels (Spain) — 2Istituto Italiano diTecnologia, Graphene Labs, Via Morego 30, I-–16163 Genova, Italy — 3Schoolof Physics, University of Exeter, Stocker Road, Exeter EX4 4QL,UK— 4RadboudUniversity, Institute for Molecules and Materials, Nijmegen,The NetherlandsI will present time-resolved studies of photoexcited graphene and graphene-hBN-based photodetectors, discussing ultrafast carrier heating, out-of-planecooling of hot graphene electrons to hyperbolic phonons in the surroundinghBN, and the conductivity of photoexcited graphene.

    Oral TUE.3B.3 14:30Two-dimensional electronic spectroscopy of graphene nanoribbons in or-ganic solution — ∙Tetsuhiko Nagahara1,2, Lucia Ganzer1, FrancoCamargo1, Yinjuan Huang3, Fugui Xu3, Yiyong Mai3, Giulio Cerullo1,and Xinliang Feng4 — 1IFN-CNR, Dipartimento di Fisica, Piazza L. da Vinci32, 20133 Milano, Italy — 2Department of Chemistry and Materials Technol-ogy, Kyoto Institute of Technology, 606-8585 Kyoto, Japan — 3School of Chem-istry and Chemical Engineering, Shanghai Jiao Tong University, 800 DongchuanRoad, Shanghai 200240, China — 4Department of Chemistry and Food Chem-istry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Ger-manyWe unravel the electronic structure of graphene nanoribbons in solution using2D electronic spectroscopy. We identify different excitons, their vibrational cou-plings and find that exciton diffusion in the graphene moiety takes place in ~300fs.

    Oral TUE.3B.4 14:45Raman spectroscopy of graphene under ultrafast laser excitation— CarinoFerrante1,2, ∙Alessandra Virga1,2, Lara Benfatto3, Miles Martinati1,Domenico De Fazio4, Ugo Sassi4, Claudia Fasolato1, Anna KatharinaOtt4, Paolo Postorino1, Duhee Yoon4, Giulio Cerullo5, FrancescoMauri1, Andrea Carlo Ferrari4, and Tullio Scopigno1,2 — 1Physics De-partment, University Rome “Sapienza”, Rome, Italy — 2Istituto Italiano di Tec-nologia, Center for Life Nano Science @Sapienza, Rome, Italy — 3ISC-CNR,Rome, Italy — 4Cambridge Graphene Centre, University of Cambridge, Cam-bridge CB3 OFA, UK — 5IFN-CNR, Dipartimento di Fisica, Politecnico di Mi-lano, P.zza L. da Vinci 32, 20133 Milano, ItalyThe out-of-equilibriumRaman response of graphene is addressed by pulsed laserexcitation. Phonon spectrum is rationalized by revisiting the electron-phononpicture in the light of a transient broadening of the Dirac cone.

  • Oral TUE.3B.5 15:00Strong-field and two-color phase-controlled photoemission from zero- andone-dimensional nanostructures — ∙Timo Paschen1, Michael Förster1,Christian Heide1, Ryan Roussel2, Michael Krüger1, ChristophLemell3, Georg Wachter3, Florian Libisch3, Thomas Madlener3,Joachim Burgdörfer3, James Rosenzweig2, and Peter Hommelhoff1,4 —1Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg(FAU), Staudtstrasse 1, 91058 Erlangen, Germany — 2UCLA Physics and As-tronomy, 475 Portola Plaza, Los Angeles, CA 90095-1547, USA — 3Institute forTheoretical Physics, Vienna University of Technology, 1040 Vienna, Austria —4Max Planck Institute for the Science of Light, Staudtstrasse 2, 91058 Erlangen,GermanyWe present photoemission from zero- and one-dimensional nanostructures.Electrons emitted from nanotips are controlled by a two-color laser field witha fidelity of 97.5 percent. One-dimensional blade structures show clear indica-tions of strong-field electron recollision.

    Oral TUE.3B.6 15:15Subcycle Wannier-Stark Localization by Mid-Infrared Bias in GalliumArsenide — Johannes Bühler1, Christian Schmidt1, Alexander-Cornelius Heinrich1, Jonas Allerbeck1, Reinold Podzimski2, DanielBerghoff2, Torsten Meier2, Wolf Gero Schmidt2, Christian Reichl3,WernerWegscheider3, ∙Daniele Brida1, and Alfred Leitenstorfer1 —1Department of Physics and Center for Applied Photonics, University of Kon-stanz, D-78457 Konstanz, Germany — 2Department of Physics and Center forOptoelectronics and Photonics Paderborn, University of Paderborn, D-33098Paderborn, Germany — 3Solid State Physics Laboratory, ETH Zurich, CH-8093Zürich, Switzerland

    The fundamental interband absorption in gallium arsenide shows a strong blueshift when biased by mid-infrared transients exceeding 10 MV/cm. This subcy-cle feature is induced by the localization of electronic wavefunctions from 3D to2D.

    Oral TUE.3B.7 15:30White-light 2D Coherent Spectroscopy Reveals Coherent Coupling of Con-fined and Continuum States in InAs/InGaAs Nanostructures— Mirco Ko-larczik, Kevin Thommes, Bastian Herzog, Sophia Helmrich, ∙NinaOwschimikow, and Ulrike Woggon — Institut für Optik und AtomarePhysik, Technische Universität Berlin, Berlin, GermanyThe In(Ga)As quantum dot/quantum well system of a semiconductor opti-cal amplifier is investigated by coherent white-light two-dimensional Fourier-transform spectroscopy. The spectrally broad probe field coherently couples ex-citon states separated by ~200 meV and reveals crossed excitons.

    TUE.PO: EXHIBITION, COFFEE BREAK & POSTER SESSION I

    Time: Tuesday, 15:45–17:15 Location: Grand Foyer

    TUE.PO.1 15:45Amorphization in Crystalline Tellurium by Femtosecond Pulses — ∙Yu-Hsiang Cheng, Samuel Teitelbaum, Frank Gao, and Keith Nelson —Massachusetts Institute of Technology, Cambridge, USACrystalline tellurium undergoes photoinduced amorphization after irradiationwith femtosecond laser pulses. The phase transition is monitored by single-shotpump-probe spectroscopy.

    TUE.PO.2 15:45Ultrafast electron-phonon coupling and photo-induced strain in the mor-photropic phase boundary of BixDy1-xFeO3 films— ∙zeyu zhang1, lu you2,juan du1, junling wang2, guohong ma3, and yuxin leng1 — 1State KeyLaboratory of High Field Laser Physics, Shanghai Institute of Optics and FineMechanics, Chinese Academy of Sciences, Shanghai 201800, China. — 2Schoolof Materials Science and Engineering, Nanyang Technological University, Singa-pore 639798, Singapore. — 3Department of Physics, ShanghaiUniversity, Shang-hai 200444, China.Using ultrafast two-color pump-probe spectroscopy, the dysprosium doped-BiFeO3 films on SrTiO3 substrate have been investigated systematically. Thedoping induced structural transition andmagnetic enhancement in BDFO is ob-served by ultrafast electron-phonon and spin-lattice interaction, respectively.

    TUE.PO.3 15:45Tailoring Ultrafast Singlet Fission by Structural Modification ofPhenazinothiadiazoles— Nicolo Alagna1, Jie Han3, Julia Herz1, ∙J. LuisPerez Lustres1, Sebastian Hahn2, Silke Koser2, Florian l. Geyer2,Uwe Bunz2, Andreas Dreuw3, Tiago Buckup1, and Marcus Motzkus1— 1Physikalisch-Chemisches Institut, Universität Heidelberg, D-69120 Hei-delberg, Germany — 2Organisch-Chemisches Institut, Universität Heidelberg,D-69120 Heidelberg, Germany — 3Institut für Wissenschaftliches Rechnen,Universität Heidelberg, D-69120 Heidelberg, GermanyUltrafast transient absorption and quantum chemistry calculations are com-bined to demonstrate singlet fission in newly functionalized TIPS-Tetracenes.The coupling strength (but not the energy gap) between S1 and 1(TT) statesgauges singlet fission efficiency and rate.

    TUE.PO.4 15:45Enhanced absorption of monolayer molybdenum disulphide with silvernano-prisms studied using transient absorption—Qiang Li1, ∙ChristopherC. S. Chan1, Jing Kong2, and Kam SingWong1 — 1Department of physics,Hong Kong University of Science and Technology Clear Water Bay, Kowloon,Hong Kong, People’s Republic of China — 2Electrical Engineering & ComputerScience, Massachusetts Institute of Technology, Massachusetts, USAAbsorption dynamics of silver nano-prisms dispersed on atomically thin molyb-

    denum disulphide was studied using pump probe spectroscopy. We demonstratethat absorption efficiency can be greatly enhanced through localised surface plas-mon resonance supported by the nano-prisms.

    TUE.PO.5 15:45Ultrafast near-field spectroscopy at the nanoscale — ∙Aina Reich, MaxEisele, and Sergiu Amarie—Neaspec GmbH, Martinsried, GermanyNear-fieldmicroscopy and spectroscopy are invaluable tools for the optical char-acterization of matter with spatial resolutions

  • the CdS shell leads to a retardation.

    TUE.PO.9 15:45Ultrafast near-field dynamics of polariton-exciton in WSe2 slab waveguidesat room temperature — ∙Michael Mrejen, Lena Yadgarov, Assaf Lev-anon, and Haim Suchowski — School of Physics and Astronomy, Tel AvivUniversity, 69978 Tel Aviv, IsraelWe observe the propagation of an exciton-polariton wave in aWSe2 nanometricslab. We directly visualize with unprecedented spatio-temporal resolution (50nm, 5eV, arecharacterized with sub-picosecond temporal resolution. Coupling between elec-tronic states and longitudinal optical phonons in these materials is quantified viareststrahlen band edge softening.

    TUE.PO.14 15:45Ultrafast Carrier Generation in Bi1−𝑥Sb𝑥 Thin Films Induced by IntenseMonocycle Terahertz Pulses — ∙Ikufumi Katayama1, Hiroki Kawakami1,Kotaro Araki1, Yuusuke Arashida1, Yasuo Minami1,2, Lie-wei Nien3,Orjan Sele Handegard3, Tadaaki Nagao3,4, Masahiro Kitajima1,3,5,6,and Jun Takeda1 — 1Yokohama National University, Yokohama, Japan —2Tokushima University, Tokushima, Japan — 3National Institute for MaterialsScience, Tsukuba, Japan — 4CREST JST, Japan — 5LxRay, Co. Ltd., Japan —6National Defense Academy, Yokosuka, JapanUsing terahertz-pump and terahertz-probe spectroscopy, we investigatedterahertz-induced carrier generation processes in Bi1−𝑥Sb𝑥 thin films. The fielddependence of the terahertz-induced transmittance change indicates distinctnonlinearity related to the Zener tunneling in narrow band-gap materials.

    TUE.PO.15 15:45Ultrafast Carrier Dynamics in Hybrid Pb-Sn Binary Perovskites— ∙SachinDev Verma, Qifei Gu, Vijay Venugopalan, Aditya Sadhanala, and Ak-shay Rao— Cavendish Laboratory, University of Cambridge, JJThomson Av-enue, Cambridge CB3 0HE, UKTransient absorption spectroscopy is being employed to understand carrier dy-

    namics in hybrid Pb-Sn perovskites. Broadening and shifting of photobleachingband towards lower energies upon Sn substitution will unravel intricate detailsof thermalization and carrier cooling.

    TUE.PO.16 15:45Electron Delocalization and Gain in CdSe/CdS Quantum Dots-in-Rods —∙Colin Sonnichsen1, Tobias Kipp2, Xiao Tang2, Patrick Brosseau1, andPatanjali Kambhampati1 — 1Dept. of Chemistry, McGill University, Mon-treal,Canada— 2Universitat Hamburg, Institut fur Physikalische Chemie, Ham-burg, GermanyUltrafast pump-probe spectroscopy is used to measure the properties of excitedCdSe quantum dots within a CdS rod. Due to electron delocalization into therod, this system shows single exciton gain and reduced Auger recombination.

    TUE.PO.17 15:45Charge Transfer and Florescence Quenching in Carbon Nanodots in thePresence of Metal Ions — ∙Andrea Cannizzo1, Alice Sciortino1,2,3,Michela Gazzetto1, M. Laura Soriano4, Egmont J. Rohwer1, ThomasFeurer1, Marco Cannas3, and Fabrizio Messina3,5 — 11Institute of Ap-plied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzer-land. — 2Dipartimento di Fisica e Astronomia, Università degli Studi di Cata-nia, Via Santa Sofia 64, 95123 Catania, Italy. — 3Dipartimento di Fisica eChimica, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo,Italy. — 4Department of Analytical Chemistry, Institute of Fine Chemistryand Nanochemistry, Campus de Rabanales, 14071 Còrdoba, Spain — 5CHAB– ATeN Center, Università degli Studi di Palermo, Viale delle Scienze, Edificio18, 90128 Palermo, ItalyPhoto-induced charge transfer fromhighly fluorescent Carbon nanodots to tran-sition metal ions in solution and the effects on fluorescence quantum yield areinvestigated with ultrafast transient absorption. The process is governed by thesolvent dynamics.

    TUE.PO.18 15:45Inhomogeneous doping of carbon nanotubes revealed by nonexponential ex-citon dynamics — ∙Klaus Eckstein, Holger Hartleb, Friedrich Schöp-pler, and Tobias Hertel — Institute of Physical and Theoretical Chemistry,Julius-Maximilians University Würzburg, GermanyWe report on femtosecond time-resolved spectroscopic investigations of electro-chemically gate-doped carbon nanotube films. Non-radiative decay of excitonswas found to be diffusion limited, which is expected for inhomogeneous dopingwith localized charge carriers.

    TUE.PO.19 15:45Ultrafast carrier interactions in metal-halide perovskites probed with two-dimensional electronic spectroscopy — Johannes M. Richter1, Fed-erico Branchi2, ∙Franco Valduga de Almeida Camargo2, TetsuhikoNagahara2, Baodan Zhao1, Richard H. Friend1, Giulio Cerullo2, andFelix Deschler1 — 1Cavendish Laboratory, University of Cambridge, UK —2Dipartimento di Fisica, Politecnico di Milano, ItalyWe use 2D electronic spectroscopy with sub-10-fs resolution to probe carrier-carrier scattering in perovskites. We report excitation-density dependent ther-malization times below 100-fs. Strong coupling with excitonic states further re-veals sub-bandgap states with low oscillator strength.

    TUE.PO.20 15:45Evidence for Free Rotation Restriction of Unsaturated Bond in Aggregation-Induced Emission — ∙Song Zhang1, Lian Wang1,2, Miaomiao Zhou1,2,and Bing Zhang1 — 1Wuhan Institute of Physics and Mathematics, ChineseAcademy of Sciences, Wuhan, P.R. China — 2University of Chinese Academy ofSciences, Beijing, ChinaWe demonstrated that the free rotation restriction of the unsaturated bond at theexcited state is the key factor for AIE effects.

    TUE.PO.21 15:45Observation of large multiple scattering effects in ultrafast electron diffrac-tion on monocrystalline silicon— ∙Isabel Gonzalez Vallejo1,2, GeoffreyGallé1, Brice Arnaud3, Shelley A. Scott4, Max G. Lagally4, Da-vide Boschetto1, Pierre-Eugene Coulon5, Giancarlo Rizza5, FlorentHoudellier6, David Le Bolloc’h2, and Jerome Faure1 — 1LOA, Palaiseau,France — 2LPS, Orsay, France — 3Institut des Molécules et Matériaux du Mans,Le Mans, France — 4University of Wisconsin-Madison, Wisconsin , USA —5LSI, Palaiseau, France — 6CEMES, Toulouse, FranceWe present our experimental results and model of rocking curves resolved byultrafast electron diffraction on monocrystalline Silicon nanomembranes. Wedemonstrate that multiple scattering processes can lead to giant photo-inducedresponses on high quality crystals.

  • TUE.PO.22 15:45Intertube energy transfer in dilute SWNT-polymer matrices — ∙PascalKunkel and TobiasHertel— Institute of Physical andTheoretical Chemistry,Julius Maximilian University Würzburg, GermanyWe present two-color transient absorption experiments of dilute single-wall car-bon nanotube-polymer matrices. Our studies reveal, that coupling betweenproximal tubes does not only allow for intertube exciton transfer but also fa-cilitates non-radiative exciton decay.

    TUE.PO.23 15:45Evidence and Implications for Exciton Driven Carrier Formation in LeadHalide Perovskites — ∙Vandana Tiwari1,2, Hong-Guang Duan1,3,4, AjayJha1, Pabitra Nayak5, Michael Thorwart3,4, Henry Snaith5, and R. J.DwayneMiller1,4,6 — 1Max Planck-Institute for the Structure and Dynamicsof Matter, Luruper Chaussee 149, 22761 Hamburg, Germany— 2Department ofChemistry, Universität Hamburg, Martin-Luther-King platz 6, Germany — 3I.Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355Hamburg, Germany — 4The Hamburg Center for Ultrafast Imaging, LuruperChaussee 149, 22761 Hamburg, Germany— 5Department of Physics, Universityof Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United King-dom — 6The Departments of Chemistry and Physics, University of Toronto, 80St. George Street, Toronto, M5S 3H6 CanadaWe have employed ultrafast transient-grating and two-dimensional electronicspectroscopy to probe dynamics of photo-excited CH3NH3PbI3 thin films with16-fs temporal resolution. We distinctly capture the 30-fs decay of excitons,weakly coupled to the phonons.

    TUE.PO.24 15:45Light-Induced Ultrafast Lattice Dynamics in Soft Semiconducting HybridOrganic-Inorganic Perovskites — ∙Tim van de Goor1, Matthew Smith2,Aaron Lindenberg3, and Felix Deschler1 — 1Cavendish Laboratory,University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK. —2Stanford Department of Chemistry, 333 Campus Drive, Room 121, Stanford,CA 94305, USA— 3Stanford Department of Materials Science and Engineering,476 Lomita Mall, Room 219, Stanford, CA 94305, USA.Hybrid perovskites are highly dynamic “soft” semiconductors with favourableoptoelectronic properties. Here we present findings from ultrafast optical pump— x-ray probe measurements that explore light-induced ultrafast structural mo-tions of the lattice.

    TUE.PO.25 15:45Large Polaron evidence in the Ultrafast THz response of Lead-HalidePerovskites — ∙Eugenio Cinquanta1,2, Daniele Meggiolaro3,4, MarinaGandini5, Edoardo Mosconi3,4, Silvia G. Motti5, Marcelo Alcocer1,CristianManzoni2, Caterina Vozzi2, Annamaria Petrozza5, Filippo DeAngelis3,4, and Salvatore Stagira1— 1Dipartimento di Fisica, Politecnico diMilano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; — 2CNR-IFN, PiazzaLeonardo da Vinci 32, 20133 Milano, Italy; — 3Computational Laboratory forHybrid/Organic Photovoltaics, CNR–IMS, Via Elce di Sotto 8, I-06123 Perugia,Italy; — 4D3-CompuNet, Istituto Italiano di Tecnologia, Via Morego 30, 16163Genova, Italy; — 5Center for Nano Science and Technology, Istituto Italiano diTecnologia, Via Giovanni Pascoli 70/3, Milan 20133, Italy;We unveil the large polaron formation in lead-halide perovskites by combiningultrafastThz spectroscopy with DFT calculations. We clarify themechanism un-derlying the physics of full-inorganic lead-halide perovskites that explain theirfascinating dielectric properties.

    TUE.PO.26 15:45Instantaneous charge separation in non-fullerene acceptor bulk-heterojunction of highly efficient solar cells — ∙Franco V. A. Camargo1,Nicola Gasparini2, Tetsuhiko Nagahara1,3, Larry Lüer4, GiulioCerullo1, and Christoph Brabec2,5 — 1IFN-CNR, Dipartimento di Fisica,Milano, Italy — 2Institute of Materials for Electronics and Energy Technol-ogy (I-MEET), Friedrich Alexander-University Erlangen-Nuremberg, Erlangen,Germany — 3Kyoto Institute of Technology, Department of Chemistry andMaterials Technology, Kyoto, Japan — 4Madrid Institute for Advanced Studies,IMDEA Nanoscience, Madrid, Spain — 5Bavarian Center for Applied EnergyResearch (ZAE Bayern), Erlangen, GermanyUsing broadband transient absorption in a high efficiency (>11%) photovoltaicblendwith a non-fullerene acceptor, we observe instantaneous (sub-30 fs) chargeseparation, demonstrating close to ideal donor-acceptor level matching andnanomorphology in this blend.

    TUE.PO.27 15:45Non-thermal nature of photoinduced insulator-to-metal transition inNbO2 — ∙Rakesh Rana1, J. Michael Klopf1, Jörg Grenzer1, Har-ald Schneider1, Manfred Helm1,2, and Alexej Pashkin1 — 1Instituteof Ion Beam Physics and Material Research, Helmholtz-Zentrum-Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany— 2TechnischeUniversität Dresden, 01062 Dresden, Germany

    We demonstrate ultrafast metallization of NbO2 in the excitation regime wherethe transient temperature remains well below the thermal insulator-to-metaltransition temperature of 1080 K. This attests for the non-thermal character ofthe photo-induced transition.

    TUE.PO.28 15:45Magnetic and Structural Dynamics in Antiferromagnetically Coupled Fe/Cr-Superlattices — ∙Daniel Schick1,2, Martin Hennecke1, Ilie Radu1,Niko Pontius2, Stefan Eisebitt1, Daniel E. Bürgler3, and Chris-tian Schüssler-Lageheine1 — 1Max-Born-Institut für Nichtlineare Optikund Kurzzeitspektroskopie, Max-Born-Str. 2a, 12489 Berlin, Germany —2Institut für Methoden und Instrumentierung der Forschung mit Synchrotron-strahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH,Albert-Einstein-Str. 15, Berlin, 12489, Germany — 3Peter Grünberg Institute,Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße, 52428 Jülich, Ger-manyWe use resonant and non-resonant soft X-ray diffraction and X-ray magneticcircular dichroism in reflection to disentangle the photoinduced spin and latticedynamics on pico- to femtosecond time scales in antiferromagnetically coupledFe/Cr superlattices in one and the same experiment.

    TUE.PO.29 15:45Ultrashort laser-induced pressure pulse to stabilize a high-pressure phasein InSb at ambient conditions — ∙amelie jarnac1,2, xiaocui wang2, åsabengtsson2, matthias burza1, carl ekström2, henrik enquist1, an-drius jurgilaitis1, norman kretzschmar3, anna persson2, chien-mingtu2, michael wulff3, fabien dorchies4, and jörgen larsson1,2 — 1MAXIV Laboratory, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden —2Department of Physics, LundUniversity, P.O. Box 118, SE-221 00 Lund, Sweden— 3ESRFThe European Synchrotron, 71 Avenue des Martyrs, 38000 Grenoble,France — 4Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Ap-plications), UMR 5107, 33400 Talence, FranceWe describe the stabilisation of indium antimonide (InSb) in the high-pressureorthorhombic phase (InSb-III) at ambient conditions. To achieve the stabilisa-tion, we developed a laser-based experimental system that can deliver picosec-ond, uniaxial pressure pulses.

    TUE.PO.30 15:45Ultrafast Vibrational Energy Transfer from photoexcited carbon nanotubesto protein — ∙Tomohito Nakayama1,2, Shunsuke Yoshizawa1, AtsushiHirano2, Takeshi Tanaka2, Kentaro Shiraki1, and Muneaki Hase1 —1University of Tsukuba, Tsukuba, Japan — 2National Institute of Advanced In-dustrial Science and Technology (AIST), Tsukuba, JapanWe demonstrate that ultrafast energy transfer from carbon nanotubes to ad-sorbed materials depends on phonon density of states of protein and surfactant,by observing relaxation dynamics of coherent radial breathing modes.

    TUE.PO.31 15:45Light and Spin Interactions: an Ultrafast Investigation in Topological Insu-lators— ∙Davide Bugini1,2, Hamoon Hedayat1, Fabio Boschini3, HemianYi4, Chaoyu Chen4, Xingjiang Zhou4, Cristian Manzoni5, ClaudiaDallera1, Giulio Cerullo1, and Ettore Carpene5 — 1Dipartimento diFisica, Politecnico di Milano, 20133 Milan, Italy — 2Center for Nano Scienceand Technology@PoliMi, Istituto Italiano di Tecnologia, Milan 20133, Italy —3Department of Physics and Astronomy, University of British Columbia, Van-couver, BC V6T 1Z1, Canada — 4National Lab for Superconductivity, Instituteof Physics, Chinese Academy of Science, Beijing 100190, China — 5CNR-IFN,Dipartimento di Fisica, Politecnico di Milano, 20133 Milan, ItalyWe present time- and angle-resolved photoemission spectroscopy measure-ments on SbxBi(2–x)SeyTe(3–y) topological insulators. Exploiting circularlypolarized femtosecond pulses we investigated spin-related ultrafast phenomenasuch as photo-induced spin current and spin-dependent relaxation processes.

    TUE.PO.32 15:45The Early Stages of Ultrafast Demagnetization — Rafael Gort1, KevinBühlmann1, SimonDäster1, Andreas Fognini2, AndreasVaterlaus1, and∙YvesAcremann1— 1Laboratory for Solid State Physics, ETH Zurich, Switzer-land — 2Department of Quantum Nanoscience, TU Delft,The NetherlandsWith time and spin resolved photoemission we demonstrate, that the spin po-larization shows different dynamics depending on the electron energy: At theFermi energy the spin polarization is reduced faster than in the valence band.

    TUE.PO.33 15:45Ultrafast lattice dynamics in lead selenide quantum dot — ∙Xuan Wang1, Matthew Gorfien2, and Jianming Cao2 — 1Institute of Physics, ChineseAcademy of Sciences, P.O. Box 603, Beijing, 100190, China — 2Physics Depart-ment and National High Magnetic Field Laboratory, Florida State University,Tallahassee, Florida, 32310, USAWe monitored lattice dynamics in PbSe quantum dots by ultrafast electrondiffraction.The electron-phonon coupling didn’t show phonon bottleneck. And

  • lattice dilation exhibited unusual features. Heat transport to the substrate devi-ated significantly from Fourier’s Law.

    TUE.PO.34 15:45Ultra-fast time resolvedX-ray absorption spectroscopy of themetal-insulatortransition in VO2 thin films— ∙XantheH. Verbeek—University of Amster-dam, Amsterdam,The NetherlandsApplying a new ’split-and-measure’ method, the dynamics of the Mott metal-insulator transition of VO2 was probed via ultra-fast X-ray absorption spec-troscopy, near the photon-noise limit. Two time-constants emerge, respectivelyin the femto- and picosecond regimes.

    TUE.PO.35 15:45An on-demand magnonic crystal induced by an optical interference pat-tern— ∙Chia-Lin Chang1, Szymon Mieszczak2, Mateusz Zelent2, Ron-nie Tamming1, Julius Janusonis1, Piotr Graczyk2, Jarosław Kłos2,3, andRa’anan Tobey1,4 — 1Zernike Institute for Advanced Materials, University ofGroningen, Groningen, The Netherlands — 2Faculty of Physics, Adam Mick-iewicz University in Poznan, Poznan, Poland — 3Institute of Physics, Greif-swaldUniversity, Greifswald, Germany— 4LosAlamosNational Laboratory, LosAlamos, USALight interference of ultrafast laser pulse on a uniformlymagnetized film inducesthe onset of magnonic bandstructure which can be visualized by the resonant in-teraction of the spin wave modes with elastics waves.

    TUE.PO.36 15:45Femtosecond XUV-only transient absorption spectroscopy at FLASH— ∙Christian Ott1, Thomas Ding1, Lennart Aufleger1, MarcRebholz1, AlexanderMagunia1, Patrick Rupprecht1, Carina da CostaCastanheira1, Maximilian Hartmann1, Veit Stooss1, Paul Birk1,Gergana D Borisova1, Kristina Meyer1, David Wachs1, Stefano MCavaletto1, Andrew R Attar2, Thomas Gaumnitz3, Zhi Heng Loh4, Se-bastian Roling5, Marco Butz5, Helmut Zacharias5, Stefan Düsterer6,Rolf Treusch6, and Thomas Pfeifer1 — 1Max-Planck-Institut für Kern-physik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Department ofChemistry, University of California, Berkeley, CA 94720, USA— 3Laboratoriumfür Physikalische Chemie, Eidgenössische Technische Hochschule Zürich,Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland— 4Division of Chemistry andBiological Chemistry, School of Physical and Mathematical Sciences, NanyangTechnological University, Singapore 637371, Singapore — 5Physikalisches In-stitut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße10, 48149 Münster, Germany — 6Deutsches Elektronen-Synchrotron DESY,Notkestr. 85, 22607 Hamburg, GermanyMulti-electron transitions in helium and neon are measured with XUV-onlytransient absorption spectroscopy at the Free-Electron-Laser in Hamburg(FLASH). Ultrafast line-shape changes are resolved at high spectral resolutiondespite the much larger FEL photon bandwidth.

    TUE.PO.37 15:45Graphite-like dynamical behaviour of graphite oxide — Amul Shinde,Christoph Testud, Katrin Adamczyk, and ∙Nils Huse — Department ofPhysics, University of Hamburg & Center of Free Electron Laser Science, Ham-burg, GermanyWe report two-colour pump-probe spectroscopy of coupled structural and elec-tronic dynamics of graphite oxide probed with 6-um and THz pulses upon fem-tosecond IR excitation.

    TUE.PO.38 15:45MonitoringHot ExcitonDissociation inHybrid LeadHalide Perovskite Filmswith Sub-10 fs Pulses — ∙Tufan Ghosh, Sigalit Aharon, Lioz Etgar,and Sanford Ruhman — Institute of Chemistry, The Hebrew University ofJerusalem, 91904, IsraelSub-10 fs pump-probe experiments which uncover exciton dissociation and car-rier cooling in hybrid perovskite films are described. Coherent wave pack-ets were also detected in the form of spectral modulation, revealing electron-phonon coupling in these materials.

    TUE.PO.39 15:45Decomposing Electronic and Lattice Contributions in Optical Pump–X-rayProbe Transient Inner-Shell Absorption Spectroscopy of CuO— ∙JohannesMahl1,2, Stefan Neppl1,3, Friedrich Roth4,5, Catherine Saladrigas1,6,Hendrik Bluhm1,7, Jinghua Guo7, Wanli Yang7, Nils Huse2,5, Wolf-gang Eberhardt5,7, and Oliver Gessner1 — 1Chemical Sciences Division,Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA — 2PhysicsDepartment Universität Hamburg, 22607 Hamburg, Germany — 3Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany —4Institute for Experimental Physics, TUBergakademie Freiberg, 09599Germany— 5Center for Free-Electron Laser Science DESY, 22607 Hamburg, Germany— 6Chemistry Department UC Berkeley, CA, 94720 USA — 7Advanced LightSource, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 USA

    Electronic and lattice contributions to transient X-ray absorption spectra of CuOare analyzed using picosecond time-resolved and temperature-dependent mea-surements. Superbandgap excitation with 355 nm and 532 nm laser pulses leadsto significantly different trends.

    TUE.PO.40 15:45Adaptive optical concept and applications for ultrafast imaging and spec-troscopy with high-brightness electron beam — Faran Zhou, JosephWilliams, Tianyin Sun, Daniel Bartles, ElliotWozniak, and ∙Chong-YuRuan—Michigan State University, East Lansing, USAWe report an electron optics concept enabling high throughput material investi-gation with temporal, spatial and spectral resolutions. Signatures of topologicaltransformation of charge-density waves are discussed in the context of fluctuat-ing orders and universal dynamics.

    TUE.PO.41 15:45Ultrafast Extreme Ultraviolet PhotoemissionWithout Space Charge—PengZhao1, Christopher Corder1, Jin Bakalis1, Xinlong Li1, Matthew D.Kershis1,2, Amanda R. Muraca1, Michael G. White1,2, and ∙ThomasK. Allison1 — 1Stony Brook University, Stony Brook, NY, 11794,USA —2Brookhaven National Lab, Brookhaven Avenue, Upton, NY, 11973,USAWe present photoelectron spectroscopy experiments using an 88 MHz cavityen-hanced high-harmonic source operating from 8 to 40 eV. Nanoampere space-charge free sample photo currents enable us to record time-resolved photo-electron spectra from weakly excited samples.

    TUE.PO.42 15:45Polarization selection rule of high-order sideband generation in transi-tion metal dichalcogenides — ∙Kohei Nagai1, Naotaka Yoshikawa1, andKoichiro Tanaka1,2— 1Department of Physics, KyotoUniversity, Kyoto, Japan— 2Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University,Kyoto, JapanWe observed high-order sideband generation in monolayer transition metaldichalcogenides. Polarization selection rule of the sideband emission under cir-cularly polarized light excitaion comes from 3-fold rotational symmetry of thecrystal.

    TUE.PO.43 15:45Time-domain THz spectroscopy of Mn2Au — ∙Nilabha Bhattacharjee1,Alexey Sapozhnik1,2, Stanislav Bodnar1, Olena Gomonay1, MartinJourdan1, and Jure Demsar1,2 — 1Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence,Materials Science in Mainz (MAINZ), Mainz, GermanyTHz spectroscopy is performed to investigate the antiferromagnetic resonancein metallic antiferromagnet. A gigantic response is observed at one THz, whichis driven by N’eel spin orbit torque and softens with increasing temperature.

    TUE.PO.44 15:45Transient dynamics in an excitonic insulator: Fast computation of nonequi-librium Green’s functions — ∙Riku Tuovinen1, Denis Golež2, MichaelSchüler2, Martin Eckstein3, and Michael Sentef1 — 1Max Planck In-stitute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany— 2Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland— 3Department of Physics, University of Erlangen-Nürnberg, 91058 Erlangen,GermanyA fast time-propagation method for the nonequilibrium Green’s function is pre-sented and applied to an excitonic insulator. We investigate the ultrafast transientdynamics and concentrate on the balance between competing ordered states.

    TUE.PO.45 15:45Two-Dimensional Control of Electron Localization in H2 Dissociation withElliptically Polarized Few-Cycle Laser Pulses— ∙SarayooKangaparambil1,Václav Hanus1, Seyedreza Larimian1, XinhuaXie1, Markus Schöffler2,GerhardPaulus3, AndriusBaltuska1, andMarkusKitzler1— 1PhotonicsInstitute, TechnischeUniversität Wien, Gusshausstrasse 27, 1040 Wien, Aus-tria — 2Institut für Kernphysik, J.W. Goethe-Universität, Max-von-Laue-Strasse1, 60438 Frankfurt am Main, Germany — 3Friedrich-Schiller-Universität Jena,Max-Wien-Platz 1, 07743 Jena, GermanyWe demonstrate two-dimensional control over the charge-localization inH2 dis-sociation using elliptically polarized laser pulses. The influences of the CEP andthe laser phase at the instant of ionization are investigated.

  • TUE.PO.46 15:45Relaxation and Fragmentation Dynamics of Large Polycyclic Aromatic Hy-drocarbons Excited by an Ultrashort XUV Pulse — ∙Marius Hervé1,Pablo Castellanos2,3, Gabriel Karras1, Victor Despré1, AlexandreMarciniak1, Eric Constant1, Vincent Loriot1, Alexander I. Kuleff4,Alexander G. G. M. Tielens2, and Franck Lépine1 — 1University of Lyon,Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622Villeurbanne, France — 2Leiden Observatory, Leiden University, P.O. Box 9513,2300 RA Leiden,The Netherlands — 3Sackler Laboratory for Astrophysics, Lei-denObservatory, LeidenUniversity, P.O. Box 9513, 2300 RALeiden,TheNether-lands — 4Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuen-heimer Feld 229, Heidelberg 69120, GermanyXUV excitation of Polycyclic Aromatic Hydrocarbons (PAHs) produces highlyexcited cationic states. Their subsequent femtosecond dynamics are probed insmall and large PAHs using XUV-IR pump-probe techniques. This reveals theimportance of many-body quantum effects.

    TUE.PO.47 15:45Non-monochromatic effects in band-structure modification by electron/holeoscillations driven by few-cycle laser pulses— ∙Vitaly Gruzdev1 and OlgaSergaeva1,2 — 1Department of Mechanical and Aerospace Engineering, Uni-versity of Missouri, Columbia, MO, USA — 2ITMO University, St. Petersburg,RussiaNon-monochromatic electron/hole oscillations driven by high-intensity ultra-short laser pulses produce specificmodifications of band structure of wide-band-gap solids that affect inter-band electron excitation and nonlinear absorption.We analyse special feature of those non-monochromatic band-structure modifi-cations.

    TUE.PO.48 15:45Generation of Raman active phonons in a thin Bi2Se3 film by THz pulses— ∙Alexey Melnikov1, Kirill Boldyrev1, Yuri Selivanov2, VictorMartovitskii2, Sergey Chekalin1, and Evgeni Ryabov1 — 1Institute ofSpectroscopy Russian Academy of Sciences, Troitsk Moscow, Russia — 2P.N.Lebedev Physics Institute Russian Academy of Sciences, Moscow, RussiaThree Raman active phonon modes are coherently excited in a single-crystalBi2Se3 film via anharmonic coupling with an infrared active phonon mode thatis resonantly driven by an intense THz pulse

    TUE.PO.49 15:45Gaining control on thermally driven ground-state reactions — T.Stensitzki1, Y. Yang1, V. Kozich1, A. A. Ahmed2,3, O. Kühn2, and ∙K.Heyne1— 1Department of Physics, Arnimallee 14, 14195 Berlin, Germany — 2Facultyof Science, Department of Chemistry, University of Cairo, 12613 Giza, Egypt —3Institute of Physics, University of Rostock, Albert Einstein-Strasse 23-24, 18059Rostock, Germany.We used infrared light to control the outcome of a chemical ground-state re-action in solution. Vibrational enhancement is demonstrated for the other-wise thermally driven reaction between phenyl isocyanate and cyclohexanol, andtoluene-2,4-diisocyanate and 2,2,2-trichloroethane-1,1-diol, respectively.

    TUE.PO.50 15:45Attosecond Transient Absorption and Four-Wave Mixing with WavelengthTunable Laser Pulses — Nathan Harkema1, Jens Baekhoj2, KennethSchafer2, Mette Gaarde2, Chen-Ting Liao1, and ∙Arvinder Sandhu1 —1University of Arizona, TucsonUSA— 2Louisiana State University, Baton RougeUSAWe extend the technique of attosecond transient absorption spectroscopy byincorporating wavelength tunable IR pulses. This technique is used to controlAutler-Townes splitting and drive XUV four-wave mixing processes in Helium.

    TUE.PO.51 15:45Ellipticity dependence of high-order harmonic generation from benzenemolecules with and without a YAG laser field — ∙Wataru Komatsubara,Shinichirou Minemoto, and Hirofumi Sakai — Department of Physics,Graduate School of Science,The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku,Tokyo 113-0033, JapanWe measure ellipticity dependence of high-order harmonic generation frombenzene molecules with and without a YAG laser field. Electron trajectory anal-ysis uncovers the dynamics of the electron wave packet, being insensitive to thenonlinear medium.

    TUE.PO.52 15:45Induced absorption reveals biexciton fine structure in monolayer tung-sten diselenide — Alexander Steinhoff1, Matthias Florian1, AkshaySingh2, Kha Tran2, Mirco Kolarczik3, Sophia Helmrich3, AlexanderAchtstein3, UlrikeWoggon3, ∙NinaOwschimikow3, Frank Jahnke1, andXiaoqin Li2 — 1Insitut für Theoretische Physik, Universität Bremen, Bremen,Germany — 2Physics Department, University of Texas, Austin, Texas, USA —3Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin,GermanyWe show in pump-probe experiments and material-realistic calculations thatelectron-hole exchange gives rise to a pronounced fine structure of biexcitonsin monolayer transition metal dichalcogenides.

    TUE.PO.53 15:45Photoemission time versus streaking delay in attosecond time-resolved solidstate photoemission— ∙Andreas Gebauer1,2, Sergej Neb1, Walter Enns1,Ulrich Heinzmann1, Andrey K. Kazansky3,4,5, and Walter Pfeiffer1— 1Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany —2University of Kaiserslautern, Erwin Schrödinger Str. 46, 67663 Kaiserslautern,Germany — 3University of the Basque Country, 20080 San Sebastián, Spain —4Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4,20018 San Sebastián, Spain — 5IKERBASQUE, Basque Foundation for Science,Maria Diaz de Haro 3, 48013 Bilbao, SpainTime-dependent Schrödinger equation simulations for a one-dimensionalmodel potential reveal that the delay extracted from a streaking spectrogramdoes not reflect the photoemission time if the streaking field inside the solidcannot be neglected.

    TUE.PO.54 15:45Robust sub-50 fs cavity-laser phase stabilization for ultrafast electron diffrac-tion instruments — ∙Martin Otto1, Laurent René de Cotret1, MarkStern1, and Bradley Siwick1,2 — 1Department of Physics, Center for thePhysics of Materials, McGill University, 3600 University Street, Montreal, QC,CA, — 2Department of Chemistry, McGill University, 801 Sherbrooke Street W,Montreal, QC, CAA novel laser-RF cavity synchronization schemewas developed for ultrafast elec-tron diffraction instruments. Timing stability improved from 100 fs to 5 fs RMSand long-term time-zero stability improved to below our measurement resolu-tion of 50 fs.

    TUE.PO.55 15:45Spectral shifts in mid-infrared assisted high-order harmonic generation ingases — ∙Balázs Major1,2, Emeric Balogh2, Katalin Kovács3, SongheeHan4, Bernd Schütte4, PaulWeber4, Marc J. J. Vrakking4, Valer Tosa3,Arnaud Rouzée4, and Katalin Varjú1,2 — 1ELI-ALPS, ELI-HU Non-ProfitLtd., Szeged, Hungary— 2Department of Optics andQuantumElectronics, Uni-versity of Szeged, Szeged, Hungary— 3National Institute for R&Dof Isotopic andMolecular Technologies, Cluj-Napoca, Romania — 4Max-Born-Institut, Berlin,GermanyWe study high-order harmonic generation in a two-color configuration. Addi-tionally to yield enhancement, cut-off extension and continuum generation, wereport and explain a spectral shift of harmonic peaks controlled by the delaybetween the pulses.

    TUE.PO.56 15:45Manipulating the distribution of photoexcited electrons on ultrafasttimescales— ∙E LaineWong, Andrew J.Winchester, Vivek Pareek, JulienMadéo, MichaelK. L.Man, and KeshavM.Dani—Okinawa Institute of Sci-ence and Technology Graduate University, Okinawa, JapanBy exploiting the spatial intensity variation within an optical pulse, we separatedthe gaussian distribution of photoexcited electrons into two. We controlled thedegree of separation by tuning the intensity of the pulse.

    TUE.PO.57 15:45Photoelectron Circular Dichroism at the Few-cycle Limit — ∙VáclavHanus1, Sarayoo Kangaparambil1, Seyedreza Larimian1, MauriceTia1, Xinhua Xie1, Sebastian Eckart2, Markus Schöffler2, AndriusBaltuska1, and Markus Kitzler1 — 1Photonics Institute, Technische Uni-versität Wien, Gusshausstrasse 27, 1040 Wien, Austria — 2Institut für Kern-physik, J.W. Goethe-Universität, Max-von-Laue-Strasse 1, 60438 Frankfurt amMain, GermanyPhotoelectron circular dichroism (PECD) was investigated for methyloxiranewith intense few-cycle pulses.The observed PECD shows a dependence on elec-tron energy.This may signify an influence of the chiral potential on the outgoingelectron’s trajectory.

  • TUE.PO.58 15:45Single pulse spontaneous polarization of polariton emission in GaAs mi-crocavity: time-resolved measurements — ∙Mikhail Kochiev1, VasiliiBelykh1,2, and Nikolai Sibeldin1 — 1P. N. Lebedev Physical Institute ofthe Russian Academy of Sciences, Moscow 119991, Russia — 2ExperimentellePhysik 2, Technische Universität Dortmund, D-44221 Dortmund, GermanyThe dynamics of spontaneous polarization of single emission pulses of polaritonBose-Einstein condensate in GaAs microcavity is studied with high temporalresolution.

    TUE.PO.59 15:45A First-principles Simulation Method for Ultrafast Nano-optics —∙Kazuhiro Yabana1, Mitsuharu Uemoto1, Shunsuke A.


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