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Proceedings Paper

Quantum-mechanical approach to surface-enhanced Raman scattering
Author(s): Vitaliy N. Pustovit; Tigran V. Shahbazyan
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Paper 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.

Paper Details

Date Published: 18 August 2005
PDF: 6 pages
Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 592709 (18 August 2005); doi: 10.1117/12.618229
Show Author Affiliations
Vitaliy N. Pustovit, Jackson State Univ. (United States)
Tigran V. Shahbazyan, Jackson State Univ. (United States)

Published in SPIE Proceedings Vol. 5927:
Plasmonics: Metallic Nanostructures and Their Optical Properties III
Mark I. Stockman, Editor(s)

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