Design and fabrication of an achromatic infrared wave plate with Sb-Ge-Sn-S system chalcogenide glass

We designed and fabricated an achromatic infrared wave plate. To examine its phase retardation characteristics, the birefringence was calculated using the effective medium theory. A wave plate with a subwavelength grating was fabricated by direct imprint lithography on a low toxic chalcogenide glass...

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Bibliographic Details
Published in:Applied optics (2004) 2013-03, Vol.52 (7), p.1377-1382
Main Authors: Yamada, Itsunari, Yamashita, Naoto, Einishi, Toshihiko, Saito, Mitsunori, Fukumi, Kouhei, Nishii, Junji
Format: Article
Language:English
Subjects:
Antimony
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Summary:We designed and fabricated an achromatic infrared wave plate. To examine its phase retardation characteristics, the birefringence was calculated using the effective medium theory. A wave plate with a subwavelength grating was fabricated by direct imprint lithography on a low toxic chalcogenide glass (Sb-Ge-Sn-S system) based on calculated results. As a result of imprinting onto chalcogenide glass by a glassy carbon mold, a grating with 1.63 μm depth, a fill factor of 0.7, and a 3 μm period was obtained. The phase retardation of the elements reached around 30° in the 8.5-10.5 μm wavelength range. The fabrication of the infrared wave plate is less costly compared with conventional crystalline wave plates.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.52.001377