Cadmium zinc telluride as a mid-infrared variable retarder

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dc.contributor.author FitzGerald, William
dc.contributor.author Taherion, Saeid
dc.contributor.author Kumar, F. Joseph
dc.contributor.author Giles, David
dc.contributor.author Hore, Dennis K.
dc.date.accessioned 2019-12-17T22:25:31Z
dc.date.available 2019-12-17T22:25:31Z
dc.date.copyright 2018 en_US
dc.date.issued 2018
dc.identifier.citation FitzGerald, W.; Taherion, S.; Kumar, F. J.; Giles, D.; & Hore, D. (2018). Cadmium zinc telluride as a mid-infrared variable retarder. Journal of Applied Physics, 123, 133103. DOI: 10.1063/1.5020320 en_US
dc.identifier.uri https://doi.org/10.1063/1.5020320
dc.identifier.uri http://hdl.handle.net/1828/11374
dc.description.abstract The electro-optic behavior of cadmium zinc telluride is examined in the mid-infrared region between 3 and 11 μm, for applied DC field strengths of up to 106 V/m. The measurements performed here include full characterization of the polarization state of the transmitted light by means of the Stokes vector. We demonstrate the suitability of this material for DC variable retarder applications such as those achieved by quarter- or half-wave retardation. A comparison of two different metallic coatings for electrodes, gold and indium, reveals important differences in performance that are attributed to the homogeneity of the field through the bulk of the crystal. We illustrate that, in the case of both metals, the same electro-optic coefficients are measured, but regions of higher and lower retardation result in significant depolarization in the case of gold. Such depolarization may adversely affect the contrast ratio in a light valve, or increase the voltage necessary for the operation of an arbitrary polarization state generator. en_US
dc.description.sponsorship We thank the Natural Sciences and Engineering Research Council of Canada (NSERC) for support of this science with Discovery, Engage, and RTI Grants. W.R.F. is grateful to NSERC, in collaboration with Redlen Technologies, for NSERC IPS-1 and IPS-2 graduate fellowships. Andrew Macdonald provided valuable assistance with the application of the DC field and designed the sample enclosure and its associated electronics. These parts were then machined by Chris Secord and Jeff Trafton. en_US
dc.language.iso en en_US
dc.publisher Journal of Applied Physics en_US
dc.subject Semiconductors en_US
dc.subject Electro-optic coefficient en_US
dc.subject Work functions en_US
dc.subject Transition metals en_US
dc.subject Optical metrology en_US
dc.subject Chemical elements en_US
dc.subject Polarization en_US
dc.subject Geometrical optics en_US
dc.subject Optical coatings en_US
dc.subject Optical polarimetry en_US
dc.title Cadmium zinc telluride as a mid-infrared variable retarder en_US
dc.type Article en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US

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