title: Advanced gas sensors based on substrate-integrated hollow waveguides and dual-color ring quantum cascade lasers.
abstract: This study shows the first combination of a ring-shaped vertically emitting quantum cascade laser (riQCL) providing two distinct emission wavelengths combined with a substrate-integrated hollow waveguide (iHWG). This ultra-compact riQCL-iHWG gas sensing device enables the simultaneous detection of two vapor phase species - here, furan and 2-methoxyethanol - providing distinctive absorption features at the emission wavelengths of the riQCL (i.e., 1144 and 1170 cm-1). Hence, multianalyte gas sensing via a unique mid-infrared (MIR) sensor concept is demonstrated.
authors: Institute of Analytical and Bioanalytical Chemistry, Ulm University, Germany. boris.mizaikoff@uni-ulm.de.
authors: Erhan
authors: E
authors: Tütüncü
authors: Institute of Analytical and Bioanalytical Chemistry, Ulm University, Germany. boris.mizaikoff@uni-ulm.de.
authors: Vjekoslav
authors: V
authors: Kokoric
authors: Institute of Solid State Electronics, TU Wien, Austria.
authors: Rolf
authors: R
authors: Szedlak
authors: Institute of Solid State Electronics, TU Wien, Austria.
authors: Donald
authors: D
authors: MacFarland
authors: Center for Micro- and Nanostructures, TU Wien, Austria.
authors: Tobias
authors: T
authors: Zederbauer
authors: Austrian Academy of Sciences, Austria.
authors: Hermann
authors: H
authors: Detz
authors: Institute of Solid State Electronics, TU Wien, Austria.
authors: Aaron Maxwell
authors: AM
authors: Andrews
authors: Center for Micro- and Nanostructures, TU Wien, Austria.
authors: Werner
authors: W
authors: Schrenk
authors: Institute of Solid State Electronics, TU Wien, Austria and Center for Micro- and Nanostructures, TU Wien, Austria.
authors: Gottfried
authors: G
authors: Strasser
authors: Institute of Analytical and Bioanalytical Chemistry, Ulm University, Germany. boris.mizaikoff@uni-ulm.de.
authors: Boris
authors: B
authors: Mizaikoff