罗丹明6G
材料科学
拉曼散射
光学
拉曼光谱
硫系化合物
表面等离子体子
等离子体子
光电子学
激发
光纤
消散波
表面等离子体激元
相干反斯托克斯拉曼光谱
硫系玻璃
荧光
物理
量子力学
作者
Lei Su,T. H. Lee,Stephen R. Elliott
出处
期刊:Optics Letters
[The Optical Society]
日期:2009-08-28
卷期号:34 (17): 2685-2685
被引量:20
摘要
We present a way of guiding light to planar surface-enhanced Raman scattering (SERS) substrates by using evanescent-wave coupling. Using nanostructured chalcogenide glass-based SERS substrates, we experimentally show the incident-angle dependence of plasmon resonances of the SERS substrates, demonstrating strong resonances at large incident angles. This allows the evanescent-wave excitation of SERS substrates through tapered optical fibers. Experiments show that fiber-taper-excited SERS substrates exhibit a significant enhancement of the Raman spectra of Rhodamine-6G analyte molecules. This configuration forms the basis of fiber-optic-based, reproducible, highly compact, and sensitive SERS systems.
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