Cadmium zinc telluride as a mid-infrared variable retarder

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dc.contributor.authorFitzGerald, William
dc.contributor.authorTaherion, Saeid
dc.contributor.authorKumar, F. Joseph
dc.contributor.authorGiles, David
dc.contributor.authorHore, Dennis K.
dc.date.accessioned2019-12-17T22:25:31Z
dc.date.available2019-12-17T22:25:31Z
dc.date.copyright2018en_US
dc.date.issued2018
dc.description.abstractThe 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.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipWe 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.identifier.citationFitzGerald, 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: 10.1063/1.5020320en_US
dc.identifier.urihttps://doi.org/10.1063/1.5020320
dc.identifier.urihttp://hdl.handle.net/1828/11374
dc.language.isoenen_US
dc.publisherJournal of Applied Physicsen_US
dc.subjectSemiconductors
dc.subjectElectro-optic coefficient
dc.subjectWork functions
dc.subjectTransition metals
dc.subjectOptical metrology
dc.subjectChemical elements
dc.subjectPolarization
dc.subjectGeometrical optics
dc.subjectOptical coatings
dc.subjectOptical polarimetry
dc.subject.departmentDepartment of Chemistry
dc.titleCadmium zinc telluride as a mid-infrared variable retarderen_US
dc.typeArticleen_US

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