Birefringent Optical Properties in Cadmium Halide Single Crystals

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  • Birefringent Optical Properties in Cadm

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Abstract

Ordinary and extraordinary refractive indices of CdC12, CdBr2 and CdI2 single crystals were measured at room and liquid nitrogen temperatures in the region from 7000 A to the shorter wavelength up to the absorption edge. The measurement was carried out by a "two-angle" interference method in which both indices could be determined together with the thickness of the sample crystal. The results were related to optical absorption. Dispersion behaviors of the indices in the energy region well below the optical gap could be analyzed using a single-effective-oscillator model.

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