title: Trace gas absorption spectroscopy using functionalized microring resonators.
abstract: 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.
authors.forename: Todd H
authors.initials: TH
authors.lastname: Stievater
authors.forename: Marcel W
authors.initials: MW
authors.lastname: Pruessner
authors.forename: Doewon
authors.initials: D
authors.lastname: Park
authors.forename: William S
authors.initials: WS
authors.lastname: Rabinovich
authors.forename: R Andrew
authors.initials: RA
authors.lastname: McGill
authors.forename: Dmitry A
authors.initials: DA
authors.lastname: Kozak
authors.forename: Robert
authors.initials: R
authors.lastname: Furstenberg
authors.forename: Scott A
authors.initials: SA
authors.lastname: Holmstrom
authors.forename: Jacob B
authors.initials: JB
authors.lastname: Khurgin