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A note on a quantum theory of surface enhanced Raman scattering

✍ Scribed by Ting-Kuo Lee; Joseph L. Birman

Publisher: John Wiley and Sons
Year: 1981
Tongue: English
Weight: 489 KB
Volume: 10
Category: Article
ISSN: 0377-0486
DOI: 10.1002/jrs.1250100126

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✦ Synopsis

Abstract

A ‘coupled mode’ set of eigenfunctions is obtained for investigations of the quantum theory of surface enhanced Raman scattering by a physiadsorbed molecule on a metal surface. The enhancement ratio R(ω) for scattering cross‐section of adsorbed to free molecules is calculated. The theory is applied to the pyridine on silver system. In the classical limit, using a geometry with flat silver surface, the ‘image enhancement’ model is recovered, and a large enhancement can be forced if unrealistic values of parameters are used. In the correct quantum theory a sharply peaked enhancement of about 10^−3^ of that reported can be obtained at laser energy about 3.7 eV. The conventional image model is thus not supported by the quantum theory. Surface roughness needs to be incorporated into this coupled mode theory.

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