Possible rationale for ultimate enhancement factor in single molecule Raman spectroscopy

被引：40

作者：

Gaponenko, S. V. ^{[1
]}

Guzatov, D. V. ^{[2
]}

机构：

[1] Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, BELARUS

[2] Y Kupala State Univ, Grodno 230023, BELARUS

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 477卷 / 4-6期

关键词：

SPONTANEOUS EMISSION; QUANTUM-THEORY; SCATTERING;

D O I：

10.1016/j.cplett.2009.07.043

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Purcell's original idea [E. M. Purcell, Phys. Rev. 69 ( 1946) 682] on modification of photon spontaneous emission rate is extended to modification of photon spontaneous scattering rate. Simultaneous account for local incident field and local density of photon states enhancements in close proximity to a silver spheroid is found to provide up to 10(14)-fold Raman scattering cross-section rise up. A model of the so-called 'hot spots' in surface enhanced spectroscopy is elaborated as local areas with high Q-factor at incident and scattered (emitted) light frequencies. Transient Raman experiments are proposed towards verification of the model. (C) 2009 Published by Elsevier B. V.

引用

页码：411 / 414

页数：4

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