Surface Plasmon Resonance Enhanced Second-Harmonic Generation in Kretschmann Configuration
| Autor: | Kotaro Kajikawa, Kazuhiko Hashimoto, Ryo Naraoka, Haruki Okawa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
animal structures
Materials science business.industry Surface plasmon Second-harmonic imaging microscopy Nonlinear optics Second-harmonic generation Fresnel equations Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optics Attenuated total reflection Electrical and Electronic Engineering Physical and Theoretical Chemistry Thin film Surface plasmon resonance business |
| Zdroj: | Opt. Commun.. 248:249-256 |
| Popis: | We report second-harmonic generation (SHG) from a thin gold film at surface plasmon resonance (SPR) in an attenuated total reflection (ATR) geometry having the Kretschmann configuration. The SHG intensity was observed to be 350–400 larger than the reflected SHG intensity in the Fresnel reflection geometry at the surface of the thin gold film. A similar enhancement was observed in the case of a thin gold film covered with a hemicyanine monolayer. These results suggest that the SHG source of the thin gold film is located outside this film. Simulation based on this model yields an enhancement factor of ∼285, in agreement with the experimental results, whereas the simulation supposing that the SHG source is located inside the gold thin film gives a factor of over 6000. This model is consistent with a hydrodynamic model of SHG in a metal, in which the nonlinear current runs outside the bulk metal and the electron density penetrates from the metal to the air at their interface. |
| Databáze: | OpenAIRE |
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