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Proceedings Paper

Chalcogenide glass thin-film optics for infrared applications
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Paper Abstract

Chalcogenide glasses are increasingly used in infrared-transparent optical systems for space applications due to their relatively low density (compared to Ge or ZnSe), tunable spectral and thermo-mechanical properties, and molding capability. Remaining challenges include their application to thin-film optics and coatings. The high refractive indices of chalcogenide glasses (n ˃ 2.7) suggest the possibility for high reflecting coatings based on few periods of alternating layers with high index contrast. As2Se3 thin film deposited by thermal evaporation is investigated using ellipsometry which show optical properties consistent with bulk material. Also we demonstrate a novel method for fabrication of antireflection coating using porous chalcogenide. Possibility of negligible extinction coefficient and low refractive index of this porous coating promises broadband suppression of undesired Fresnel reflections at the interface from infrared optics.

Paper Details

Date Published: 3 June 2014
PDF: 7 pages
Proc. SPIE 9085, Sensors and Systems for Space Applications VII, 908507 (3 June 2014); doi: 10.1117/12.2050532
Show Author Affiliations
Janardan Nath, Univ. of Central Florida (United States)
Deep Panjwani, Univ. of Central Florida (United States)
R. E. Peale, Univ. of Central Florida (United States)
J. David Musgraves, IRradiance Glass, Inc. (United States)
Pete Wachtel, IRradiance Glass, Inc. (United States)
Jennifer McKinley, IRradiance Glass, Inc. (United States)

Published in SPIE Proceedings Vol. 9085:
Sensors and Systems for Space Applications VII
Khanh D. Pham; Joseph L. Cox, Editor(s)

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