Trace gas absorption spectroscopy using functionalized microring resonators

We detect trace gases at parts-per-billion levels using evanescent-field absorption spectroscopy in silicon nitride microring resonators coated with a functionalized sorbent polymer. An analysis of the microring resonance line shapes enables a measurement of the differential absorption spectra for a...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 4; p. 969
Main Authors Stievater, Todd H, Pruessner, Marcel W, Park, Doewon, Rabinovich, William S, McGill, R Andrew, Kozak, Dmitry A, Furstenberg, Robert, Holmstrom, Scott A, Khurgin, Jacob B
Format Journal Article
LanguageEnglish
Published United States 15.02.2014
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Summary:We detect trace gases at parts-per-billion levels using evanescent-field absorption spectroscopy in silicon nitride microring resonators coated with a functionalized sorbent polymer. An analysis of the microring resonance line shapes enables a measurement of the differential absorption spectra for a number of vapor-phase analytes. The spectra are obtained at the near-infrared overtone of OH-stretch resonance, which provides information about the toxicity of the analyte vapor.
ISSN:1539-4794
DOI:10.1364/ol.39.000969