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

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, demonst...

Full description

Saved in:
Bibliographic Details
Published in:Optics letters 2009-09, Vol.34 (17), p.2685-2687
Main Authors: LEI SU, LEE, T. H, ELLIOTT, S. R
Format: Article
Language:English
Subjects:
Applied sciences
Chalcogens - chemistry
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fiber Optic Technology
Glass
Integrated optics. Optical fibers and wave guides
Light
Microscopy, Electron, Scanning - methods
Nanoparticles - chemistry
Optical and optoelectronic circuits
Optics and Photonics
Rhodamines - pharmacology
Scattering, Radiation
Spectroscopy, Fourier Transform Infrared - methods
Spectrum Analysis, Raman - methods
Surface Plasmon Resonance - methods
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.34.002685