Optical Constants of Zinc Telluride Thin Films in the Visible and Near-Infrared Regions

Abstract

In this study, thin films of ZnTe were deposited on glass substrates usingvacuum evaporation technique. The optical measurements on the deposited filmswere performed to determine the transmission spectrum and the absorption spectraas a function of incident wavelength. As well, optical parameters, such asextinction coefficient, value and type of energy gap, type of the dominantabsorption processes, real and complex refractive index as functions of incidentphoton energy, were determined. This study may present better understanding forthe optical properties of ZnTe thin films and their devices in order to enhance theircharacteristics and improve their efficiencies.