Evanescent-wave excitation of surface-enhanced Raman scattering substrates by an optical-fiber taper

被引：22

作者：

Su, Lei ^{[1
]}

Lee, T. H. ^{[1
]}

Elliott, S. R. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

OPTICS LETTERS | 2009年 / 34卷 / 17期

关键词：

CHALCOGENIDE GLASS; SERS SENSOR; GRATINGS; NANOPARTICLES; SPECTROSCOPY;

D O I：

10.1364/OL.34.002685

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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. (C) 2009 Optical Society of America

引用

收藏

页码：2685 / 2687

页数：3

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