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Proceedings Paper

Hydrogen gas sensing using palladium-coated microdisk microresonators
Author(s): Mustafa Eryurek; Yasin Karadag; Nevin Taşaltın; Necmettin Kilinç; Alper Kiraz
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Paper Abstract

An SU-8 polymer microdisk resonator coated with a palladium (Pd) layer and coupled to a single-mode optical waveguide is used to as a hydrogen (H2) gas sensor. In the presence of H2, a red shift is observed in the spectral positions of the microdisk whispering gallery modes (WGMs) due to the expansion in the Pd lattice. H2 concentrations below the flammable limit (4%) down to 0.3% could be detected in nitrogen atmosphere at room temperature. For H2 concentrations between 0.3 − 1%, WGM spectral positions shifted linearly with H2 concentration at a rate of 32 pm/%H2. Average response time of the devices was measured to be 50 s for 1% H2. The proposed device concept can also be used to detect different chemical gases by using appropriate sensing layers.

Paper Details

Date Published: 3 March 2015
PDF: 6 pages
Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 93430J (3 March 2015); doi: 10.1117/12.2078244
Show Author Affiliations
Mustafa Eryurek, Koç Univ. (Turkey)
Yasin Karadag, Marmara Univ. (Turkey)
Nevin Taşaltın, TÜBITAK Marmara Research Ctr. (Turkey)
Necmettin Kilinç, Koç Univ. (Turkey)
Alper Kiraz, Koç Univ. (Turkey)

Published in SPIE Proceedings Vol. 9343:
Laser Resonators, Microresonators, and Beam Control XVII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke; Kunihiko Washio, Editor(s)

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