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28 April 2017 Waveguide-enhanced Raman scattering for chemical sensing (Conference Presentation)
Scott A. Holmstrom, Todd H. Stievater, Dmitry A. Kozak, R. Andrew McGill
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Proceedings Volume 10110, Photonic Instrumentation Engineering IV; 101100Y (2017) https://doi.org/10.1117/12.2252792
Event: SPIE OPTO, 2017, San Francisco, California, United States
Abstract
We will review the state of the art for on-chip, Raman-based sensing using waveguides including our recent work with sorbent-coated waveguides for trace gas sensing showing parts-per-billion limits of detection. We will show that signal enhancements due to scattering that takes place in the evanescent field coupled with a thin hypersorbent polymer coating can yield Raman efficiencies which are nine orders of magnitude larger than traditional micro-Raman techniques. We will also discuss challenges with gas component discrimination and in moving toward a fully integrated photonic circuit architecture for handheld Raman-based trace gas sensors.
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Scott A. Holmstrom, Todd H. Stievater, Dmitry A. Kozak, and R. Andrew McGill "Waveguide-enhanced Raman scattering for chemical sensing (Conference Presentation)", Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 101100Y (28 April 2017); https://doi.org/10.1117/12.2252792
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KEYWORDS
Waveguides
Raman scattering
Biological and chemical sensing
Gas sensors
Raman spectroscopy
Coating
Integrated photonics
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