Open-path detection of organic vapors via quantum infrared spectroscopy

Article Article scientifique Article Open-path detection of organic vapors via quantum infrared spectroscopy eng 2024-09-05 2024-09-01 author Neves Simon François Marius 0000-0002-0853-1506 408287 author Kartiyasa Adimulya 0009-0003-3142-1174 962529 author Ghosh Shayantani 0000-0003-0479-6248 937060 Serv com physique appliquée (FIGCO) author Gaulier Geoffrey 749322 author La Volpe Luca 927335 author Wolf Jean-Pierre 0000-0003-3729-958X 631266 Serv com physique appliquée (FIGCO) 096108 10.1063/5.0220707 2378-0967 https://pubs.aip.org/app/article/9/9/096108/3311589/Open-path-detection-of-organic-vapors-via-quantum <p>In recent years, quantum Fourier transform infrared (QFTIR) spectroscopy has emerged as an alternative to conventional absorption spectroscopy in the mid-infrared region of the spectrum. By harnessing induced coherence and spectral correlations of photon pairs in a nonlinear Michelson interferometer, this technique offers promising potential for the practical detection of organic gases. However, little research was conducted to bring QFTIR spectrometers closer to domestic or in-field usage. In this work, we present the first use of a QFTIR spectrometer for open-path detection of multiple interfering organic gases in ambient air. We built a nonlinear Michelson interferometer with 1.7 m-long arms to increase the absorption length, coupled with analysis techniques from classical differential absorption spectroscopy used for gas-traces detection. We thus characterize our spectrometer’s sensitivity to acetone, methanol, and ethanol vapors and demonstrate the accurate identification of mixtures of these gases released in ambient air. We show this characteristic is preserved over time by performing a measurement overnight and tracking the evolution of different gases’ average concentrations. These results constitute the first use-case of a QFTIR spectrometer as a detector of organic gases and, thus, represent an important milestone toward the development of such detectors in practical situations.</p> Dewey 500.2 27 Section de physique 13 false 676 Groupe Wolf APL photonics 9 9 85e985c4-c83a-4945-a9c4-1480fe21cf84 Article (Published version) Public Article_scientifique_from_crossref(.pdf 4423195 application/pdf CC BY-4.0 6ff394c1c6de50ea389bc0f97e5c6b8877759d8173c50212e78f53615248402d openAccess Faculté des sciences / Section de physique

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Open-path detection of organic vapors via quantum infrared spectroscopy	APL photonics			2024	172	145

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Neves, Simon François Marius