Zeitschriftenartikel:
H. Zhao, B. Baumgartner, A. Raza, A. Skirtach, B. Lendl, R. Baets:
"Multiplex Volatile Organic Compound (VOC) Raman Sensing With Nanophotonic Slot Waveguides Functionalized With A Mesoporous Enrichment Layer";
Optics Letters,
45
(2020),
2;
4 S.
Kurzfassung englisch:
We report, to the best of our knowledge, the first Raman sensor for broadband vapor-phase volatile organic compounds (VOCs) based on silicon nitride waveguides functionalized with a mesoporous silica top-cladding. The Raman response of low-concentration VOC gases are evanescently probed via a centimeter-long functionalized slot waveguide. Thanks to the five orders of magnitude concentration factor offered by the mesoporous coating, the detection limit of acetone, ethanol and isopropyl alcohol (IPA) is determined to be 594 ppm, 157 ppm, and 53 ppm respectively with 1 s measurement time in the current setup. Capable of multiplex gas sensing in a complex matrix through fast and reversible adsorption, the demonstration paves the way to on-site continuous VOC monitoring.
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1364/OL.379469
Elektronische Version der Publikation:
https://publik.tuwien.ac.at/files/publik_285126.pdf
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.