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Proceedings Paper

Nanofabrication of surface-enhanced Raman scattering substrates for optical fiber sensors
Author(s): Paul R. Stoddart; S. Jayawardhana
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Paper Abstract

Surface-enhanced Raman scattering (SERS) allows the detection of sub-monolayer adsorbates on nanostructured metal surfaces (typically gold or silver). The technique has generated interest for applications in biosensing, high-resolution chemical mapping and surface science. SERS is generated by the localized surface plasmon resonance that occurs when the nano-metal is exposed to laser light. These plasmonic effects rely on features as small as ~1 nm, which poses a challenge for the fabrication of sensitive and reproducible substrates. Consequently a wide range of nanofabrication techniques have been used to make SERS substrates. Further challenges are encountered when transferring wafer-scale techniques to the tips of optical fibers in order to produce devices for in vivo SERS sensing. Here we describe fiber tip substrates based on miniaturization by fiber drawing, physical vapor deposition and nanoimprint lithography. Despite recent progress, the fabrication of sensitive, reproducible and affordable SERS fiber sensors remains an unresolved problem.

Paper Details

Date Published: 5 March 2013
PDF: 8 pages
Proc. SPIE 8613, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VI, 86130M (5 March 2013); doi: 10.1117/12.2004019
Show Author Affiliations
Paul R. Stoddart, Swinburne Univ. of Technology (Australia)
S. Jayawardhana, Univ. of Sri Jayewardenepura (Sri Lanka)

Published in SPIE Proceedings Vol. 8613:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VI
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf, Editor(s)

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