Spectral dependence of single molecule fluorescence enhancement
Spectral dependence of single molecule fluorescence enhancement
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DOI：
10.1364/oe.15.014266
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发表时间：
2007-10-17
期刊：
影响因子：
3.8
通讯作者：
Novotny, Lukas
中科院分区：
文献类型：
--
作者：
Bharadwaj, Palash;Novotny, Lukas
来自单个分子的荧光可以在充当光学天线的金属纳米颗粒附近强烈增强。我们证明了这种天线效应的光谱可调谐性，并表明当发射频率从粒子的表面等离子体共振红移时，实现了最大的增强。我们的实验结果，使用个别金和银粒子在不同的激光频率激发，是在良好的协议与分析理论预测不同的光谱依赖的辐射和非辐射衰变率。(c)2007年，美国光学学会。
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.