Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3-SiO2

Kefer S, Dai J, Yang M, Schmauß B, Hellmann R (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Optics Letters Optical Society of America

Book Volume: 45

Pages Range: 3601-3604

Journal Issue: 13

DOI: 10.1364/OL.395341

Abstract

This Letter demonstrates a novel, to the best of our knowledge, 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.

Authors with CRIS profile

Bernhard Schmauß Professur für Hochfrequenztechnik mit dem Schwerpunkt Optische Hochfrequenztechnik und Photonik

Involved external institutions

Wuhan University of Technology CN China (CN) Technische Hochschule Aschaffenburg DE Germany (DE)

How to cite

APA:

Kefer, S., Dai, J., Yang, M., Schmauß, B., & Hellmann, R. (2020). Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3-SiO2. Optics Letters, 45(13), 3601-3604. https://dx.doi.org/10.1364/OL.395341

MLA:

Kefer, Stefan, et al. "Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3-SiO2." Optics Letters 45.13 (2020): 3601-3604.

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