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Proceedings Paper

Nanophotonic waveguides for chip-scale raman spectroscopy: Theoretical considerations
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Paper Abstract

Highly evanescent nanophotonic waveguides enable extremely efficient Raman spectroscopy in chip-scale photonic integrated circuits due to the continuous excitation and collection of Raman scattering along the entire waveguide length. Such waveguides can be used for detection and identification of condensed-phase analytes, or, if functionalized by a sorbent as a top-cladding, can be used to detect trace concentrations of chemical species. The scattering efficiency is modified in guided-mode structures compared to unconfined, micro-Raman geometries. Here, we describe the theoretical framework for understanding the Raman scattering efficiency in nanophotonic waveguides, and compare these calculations to our measurements of trace gases in hypersorbent-clad silicon nitride waveguides.

Paper Details

Date Published: 12 May 2016
PDF: 6 pages
Proc. SPIE 9824, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII, 982404 (12 May 2016); doi: 10.1117/12.2227905
Show Author Affiliations
Todd H. Stievater, U.S. Naval Research Lab. (United States)
Jacob B. Khurgin, Johns Hopkins Univ. (United States)
Scott A. Holmstrom, The Univ. of Tulsa (United States)
Dmitry A. Kozak, U.S. Naval Research Lab. (United States)
Marcel W. Pruessner, U.S. Naval Research Lab. (United States)
William S. Rabinovich, U.S. Naval Research Lab. (United States)
R. Andrew McGill, U.S. Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 9824:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII
Augustus Way Fountain, Editor(s)

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