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Surface Plasmons Enhanced SHG and SFG Yi Rao 07-15-08
Surface Plasmons Enhanced SHG and SFG
Yi Rao07-15-08
SHG and SFG
ωSF
ωIR
ωVIS
IRVIS
SUMIR
VISInterface
1. Interface-selective
2. Coherent process
Second order process has low yield
Surface Plasmons and SHG
Enhancement factor 104
SHG:
Diffusive
Depolarized
Cu Au
Surface Plasmons and SFG
Local field(Surface plasmon), Interparticle coupling (particle space)
Preliminary Results (SFG)
Future direction
• Enhancement Mechanisms of Enhanced SHG and SFG• Improving enhancement factor• Extend enhancement into more systems
1014
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