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Proceedings Paper

Nanoimprinting on optical fiber end faces for chemical sensing
Author(s): G. Kostovski; D. J. White; A. Mitchell; M. W. Austin; P. R. Stoddart
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Paper Abstract

Optical fiber surface-enhanced Raman scattering (SERS) sensors offer a potential solution to monitoring low chemical concentrations in-situ or in remote sensing scenarios. We demonstrate the use of nanoimprint lithography to fabricate SERS-compatible nanoarrays on the end faces of standard silica optical fibers. The antireflective nanostructure found on cicada wings was used as a convenient template for the nanoarray, as high sensitivity SERS substrates have previously been demonstrated on these surfaces. Coating the high fidelity replicas with silver creates a dense array of regular nanoscale plasmonic resonators. A monolayer of thiophenol was used as a low concentration analyte, from which strong Raman spectra were collected using both direct endface illumination and through-fiber interrogation. This unique combination of nanoscale replication with optical fibers demonstrates a high-resolution, low-cost approach to fabricating high-performance optical fiber chemical sensors.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70042H (16 May 2008); doi: 10.1117/12.785975
Show Author Affiliations
G. Kostovski, RMIT Univ. (Australia)
D. J. White, Swinburne Univ. of Technology (Australia)
A. Mitchell, RMIT Univ. (Australia)
M. W. Austin, RMIT Univ. (Australia)
P. R. Stoddart, Swinburne Univ. of Technology (Australia)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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