Quantum-mechanical approach to surface-enhanced Raman scattering

Vitaliy N. Pustovit; Tigran V. Shahbazyan

doi:10.1117/12.618229

18 August 2005 Quantum-mechanical approach to surface-enhanced Raman scattering

Vitaliy N. Pustovit, Tigran V. Shahbazyan

Proceedings Volume 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III; 592709 (2005) https://doi.org/10.1117/12.618229
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We present a microscopic model for surface-enhanced Raman scattering (SERS) from molecules adsorbed on small noble-metal nanoparticles. We demonstrate that, in nanometer-sized particles, SERS is determined by a competition between two distinct quantum-size effects: Landau damping of surface plasmon resonance and reduced screening near nanoparticle surface. The first mechanism comes from the discreteness of energy spectrum in a nanoparticle and leads to a general decrease in SERS. The second mechanism originates from the different effect of confining potential on sp-band and d-band electron states and leads to a relative increase in SERS. We calculate numerically the spatial distribution of local field near the surface and the enhancement factor for different nanoparticles sizes.

Citation Download Citation

Vitaliy N. Pustovit and Tigran V. Shahbazyan "Quantum-mechanical approach to surface-enhanced Raman scattering", Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 592709 (18 August 2005); https://doi.org/10.1117/12.618229

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