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The optical response of ZnTe in the 1.5–5.6 eV photon energy range at room temperature has been studied by spectroscopic ellipsometry. The measured dielectric-function spectra reveal distinct structures at energies of the E0, E1, E1+Δ1, and E2 critical points. These data are analyzed on the basis of simplified model of the interband transitions. Results are in satisfactory agreement with the calculations over the entire range of the photon energies. Dielectric-related optical constants of ZnTe, such as the complex refractive index, the absorption coefficient, and the normal-incidence reflectivity, are presented and analyzed. Results of surface-treatment effect on the pseudodielectric functions have also been presented.
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Sato et al. (1993) studied this question.
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