Comparison of properties inherent to wave plates and Fresnel rhomb

Virko, S. V.; Lashkaryov, V.

doi:10.15407/spqeo16.01.064

Cited by 4 publications

(1 citation statement)

References 8 publications

(13 reference statements)

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“…Achromatic optical retardation at a quarter-or halfwave level can be achieved in the infrared with rhomb designs of high-refractive index materials like ZnSe. [2][3][4][5][6] Depending on the type of variable retarder and the desired application, the retardation can be fixed at one value and then stepped, or it can be continuously changing with a set frequency. When fixed at one retardation, variable retarders can be useful for polarization state generation at different wavelengths, or as a light valve which switches on and off by alternating between half-wave retardation and no retardation.…”

Section: Introductionmentioning

confidence: 99%

Cadmium zinc telluride as a mid-infrared variable retarder

Fitzgerald

Taherion

Kumar

et al. 2018

Journal of Applied Physics

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The electro-optic behavior of cadmium zinc telluride is examined in the mid-infrared region between 3 and 11 lm, for applied DC field strengths of up to 10 6 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.

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Section: Introductionmentioning

confidence: 99%