Journal
PLASMONICS
Volume 8, Issue 1, Pages 13-23Publisher
SPRINGER
DOI: 10.1007/s11468-012-9371-3
Keywords
Surface-enhanced Raman scattering; Molecular detection; Label free detection; Optical fiber sensors
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Surface-enhanced Raman scattering (SERS) takes advantage of the giant electromagnetic field enhancement provided by localized surface plasmons in metal nanoparticles to amplify the weak Raman scattering of the molecules. Optical fibers coated with noble metal nanoparticles can therefore be used as SERS-based sensors for remote detection of molecular species. In this article, we report on the development of an optical fiber SERS sensor capable to operate on a range of excitation wavelengths from the visible to the near-infrared. We introduce a quasistatic chemical etching protocol to engineer the tip shape and investigate the effects of the tip shape on the sensor performances.
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