Refractive Index of ZnSe, ZnTe, and CdTe

Abstract

Refractive indexes of ZnSe,ZnTe, and CdTe were obtained from prism refraction data and are reported for a series of wavelengths from 2.5 μ to the short‐wave transmission limits set by the band gaps. The results were fitted with the standard formula: n 2=A +[Bλ2/(λ2−c 2)] where n is the refractive index and λ is the wavelength in microns. For ZnSe the best values of the parameters are A=4.00, B=1.90, and c 2=0.113; for ZnTe,A=4.27, B=3.01, and c 2=0.142; and for CdTe,A=5.68, B=1.53, and c 2=0.366. Possible causes for the discrepancies between the present results and earlier data are discussed.