Woodpile Photonic Crytalsfabricated by

Two-Photon Polymerisation

Gaël NardinCours Photonic Crystals 2009

Woodpile Photonic Crystals

Woodpile Photonic Crystals

Outline

• Two-photon Polymerisation technique (2PP)

• Fabrication of woodpile photonic crystals

• Superprism effect

• Inversion

• Infiltration of Quantum Dots

Two-Photon Polymerisation (2PP)

Not diffraction limited

Practical resolution obtained :~100nm on x-y plane

300nm along z direction

J. Serbin et al, Optics Express 28, (2003)

Two-Photon Polymerisation (2PP)

Resins:- SU-8- Ormocer

J. Serbin et al, Optics Express 28, (2003)

n=~ 1.5

www.lzh.de

C. Reinhardt et al, Optics Lett. 31, (2006)

J. Serbin et al., Optics Express 21 (2004)

disorder and imperfections within the fabricated crystal→ Rayleigh scattering scaling as λ −4

Optical characterization

J. Serbin et al., Optics Express 21 (2004)

J. Li et al., Optics Express 24 (2008)

Superprism effect

J. Serbin et al., J. Appl. Phys 98 (2005)J. Serbin et al., Adv. Mat. 18 (2006)

Superprism effect

J. Serbin et al., Optics Express 14 (2006)

Inversion

Infiltration with TiO2

J. Serbin et al., Optics Express 21 (2004)

Inversion

J. Serbin et al., Optics Express 21 (2004)

Infiltration with TiO2 Infiltration with TiO2 mixed with SiO2

SU-8 TiO2

TiO2 & SiO2

B. Jia et al., J. Appl. Phys 102 (2007)

Inversion

J. Serbin et al., Optics Express 21 (2004)

Infiltration with TiO2 Infiltration with TiO2 mixed with SiO2

SU-8 TiO2

TiO2 & SiO2

B. Jia et al., J. Appl. Phys 102 (2007)

“almost completely reproducible”

Inversion

Infiltration with TiO2 mixed with SiO2

SU-8 TiO2

TiO2 & SiO2

B. Jia et al., J. Appl. Phys 102 (2007)

n = 2.2

Measurement: Average on 18° to 41° with respect to the surface normal of the PC

Infiltration of Quantum Dots

J. Li et al., Adv. Mat. 19 (2007)

PbSe QDs

Infiltration of Quantum Dots

J. Li et al., Adv. Mat. 19 (2007)

Transmission of PC

Bare QD emission

Infiltration of Quantum Dots

J. Li et al., Adv. Mat. 19 (2007)

QDs alone QDs in PC

“This work provides an important step towards controlling QD emission in the NIR wavelength range with 3D PCs, which could facilitate the exploration of advanced functionalities of the 3D PCs for active devices in telecommunications.”

Conclusions

• Technique puissante et rapide pour la réalisation de structures arbitraires 3D diélectriques

• Jolies images SEM

• Performances optiques limitées par le désordre

• Integration avec d’autres technologies difficile