TY - JOUR A1 - Kefer, Stefan A1 - Dai, Jixiang A1 - Yang, Minghong A1 - Schmauss, Bernhard A1 - Hellmann, Ralf T1 - Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3-SiO2 JF - Optics Letters N2 - This letter demonstrates a novel hydrogen sensor based on a polymer planar Bragg grating coated with Pt-loaded WO3-SiO2. The reflected Bragg signal shows a distinct peak splitting correlated to substrate anisotropies originating from the injection molding process. Especially at low H2 concentrations, both sensing peaks exhibit an outstanding response to the heat generated by the exothermic reaction between hydrogen molecules and coating. Thereby, a hydrogen volume ratio of 50 ppm leads to a Bragg wavelength shift of -37 pm, which yields an outstandingly low detection limit of only 5 ppm H2 in air. Thus, functionalized polymer planar Bragg gratings are eminently suitable for H2 leak detection applications. KW - Bragg Grating Sensors KW - Hydrogen Detection KW - Cyclic Olefin Copolymers KW - Gassensor KW - Wasserstoff KW - Bragg-Reflektor Y1 - 2020 UR - https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-13-3601 U6 - https://doi.org/https://doi.org/10.1364/OL.395341 VL - 45 IS - 13 SP - 3601 EP - 3604 ER - TY - GEN A1 - Kefer, Stefan A1 - Dai, Jixiang A1 - Yang, Minghong A1 - Schmauss, Bernhard A1 - Hellmann, Ralf T1 - Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3–SiO2: erratum N2 - We present an erratum to our Letter [Opt. Lett. 45, 3601 (2020)]. Labeling errors in two figures and an incorrect sentence are revised. The corrections have no influence on the conclusions of the original Letter. N2 - Erratum KW - Bragg Grating, Hydrogen Detection, Functionalization KW - Gassensor KW - Wasserstoff KW - Bragg-Reflektor Y1 - 2020 UR - https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-16-4498 U6 - https://doi.org/https://doi.org/10.1364/OL.401819 VL - 45 IS - 16 SP - 4498 EP - 4498 ER -