Field enhancement and molecular response in surface-enhanced Raman scattering and fluorescence spectroscopy

被引：72

作者：

Käll, M ^{[1
]}

Xu, HX

Johansson, P

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

[2] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden

[3] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[4] Univ Orebro, Dept Nat Sci, S-70182 Orebro, Sweden

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2005年 / 36卷 / 6-7期

关键词：

field enhancement; molecular quantum dynamics; plasmons; surface-enhanced Raman scattering; fluorescence;

D O I：

10.1002/jrs.1357

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We present a theoretical analysis of surface-enhanced Raman scattering and fluorescence emission from chromophoric molecules located at electromagnetic 'hot spots' in nanoparticle aggregates. The model combines classical electrodynamic enhancement effects with molecular quantum dynamics and allows us to quantify various molecular cross-sections and spectral properties. For a model molecule that simulates rhodamine 6G, we find that an electromagnetic Raman enhancement of the order of loll results in an effective Raman cross-section of the order of 10(-14) cm(2), in agreement with single-molecule Raman measurements. Copyright (c) 2005 John Wiley & Sons, Ltd.

引用

页码：510 / 514

页数：5

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