Spectral dependence of single molecule fluorescence enhancement

被引：464

作者：

Bharadwaj, Palash ^{[1
]}

Novotny, Lukas ^{[1
]}

机构：

[1] Univ Rochester, Inst Opt, Dept Phys & Astron, Rochester, NY 14627 USA

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 21期

关键词：

D O I：

10.1364/OE.15.014266

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The fluorescence from a single molecule can be strongly enhanced near a metal nanoparticle acting as an optical antenna. We demonstrate the spectral tunability of this antenna effect and show that maximum enhancement is achieved when the emission frequency is red-shifted from the surface plasmon resonance of the particle. Our experimental results, using individual gold and silver particles excited at different laser-frequencies, are in good agreement with an analytical theory which predicts a different spectral dependence of the radiative and non-radiative decay rates. (c) 2007 Optical Society of America.

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页码：14266 / 14274

页数：9

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