Surface-enhanced Raman scattering on the nanoscale: a microscopic approach

A microscopic approach to surface-enhanced Raman scattering (SERS) from molecules adsorbed on noble-metal nanoparticles is developed. For nanoparticle sizes smaller than 10 nm, the classical electromagnetic enhancement mechanism is modified by quantum-size effects. Using the time-dependent local fie...

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Bibliographic Details
Published in:Journal of optics. A, Pure and applied optics Pure and applied optics, 2006-04, Vol.8 (4), p.S208-S212
Main Authors: Pustovit, Vitaliy N, Shahbazyan, Tigran V
Format: Article
Language:English
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Summary:A microscopic approach to surface-enhanced Raman scattering (SERS) from molecules adsorbed on noble-metal nanoparticles is developed. For nanoparticle sizes smaller than 10 nm, the classical electromagnetic enhancement mechanism is modified by quantum-size effects. Using the time-dependent local field approximation, we perform a systematic analysis of SERS in nanometre-sized Ag nanoparticles. We find that, in small nanoparticles, Raman cross-section enhancement is governed by the interplay between Landau damping of the surface plasmon and interband screening in the nanoparticle surface layer.
ISSN:1464-4258
1741-3567
DOI:10.1088/1464-4258/8/4/S21