Detection of hydrogen by means of a thin film interferometer Fabry-Perot applying a-WO<sub>3</sub> layers

Erwin Maciak; Zbigniew Opilski; Marian W. Urbanczyk

doi:10.1117/12.581743

8 September 2004 Detection of hydrogen by means of a thin film interferometer Fabry-Perot applying a-WO₃ layers

Erwin Maciak, Zbigniew Opilski, Marian W. Urbanczyk

Proceedings Volume 5576, Lightguides and their Applications II; (2004) https://doi.org/10.1117/12.581743
Event: Lightguides and their Applications II, 2003, Krasnobrod, Poland

Abstract

The paper presents a layered sensing structure that permits to detect and to measure the concentration of hydrogen in a gaseous medium. This metal-dielectric-metal structure is a layered Fabry-Perot interferometer. The resonant cavity is made of WO₃. The choice of just this material was dictated by its chemochromatic properties, i.e. the change of the optical properties due to the absorption of atomic hydrogen. In result of the absorption of H⁺ and e^- the purely dielectric layer becomes a lost layer, displaying attenuation. The catalysis of molecular hydrogen to atomic hydrogen occurs in the palladium layer, which is also one of the mirrors of the interferometer. The measurement of the hydrogen concentration consists in the scanning of the angular variation of the interference peak position due to the absorption of hydrogen. The change of the peak position results from the change of the optical parameters of the Pd and WO₃ layers.

Citation Download Citation

Erwin Maciak, Zbigniew Opilski, and Marian W. Urbanczyk "Detection of hydrogen by means of a thin film interferometer Fabry-Perot applying a-WO₃ layers", Proc. SPIE 5576, Lightguides and their Applications II, (8 September 2004); https://doi.org/10.1117/12.581743

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available