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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 11 — Oct. 21, 2009

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

Lei Su, T. H. Lee, and S. R. Elliott  »View Author Affiliations


Optics Letters, Vol. 34, Issue 17, pp. 2685-2687 (2009)
http://dx.doi.org/10.1364/OL.34.002685


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Abstract

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.

© 2009 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(300.6450) Spectroscopy : Spectroscopy, Raman
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Spectroscopy

History
Original Manuscript: April 29, 2009
Revised Manuscript: June 28, 2009
Manuscript Accepted: July 29, 2009
Published: August 31, 2009

Virtual Issues
Vol. 4, Iss. 11 Virtual Journal for Biomedical Optics

Citation
Lei Su, T. H. Lee, and S. R. Elliott, "Evanescent-wave excitation of surface-enhanced Raman scattering substrates by an optical-fiber taper," Opt. Lett. 34, 2685-2687 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-17-2685

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