Thermally Deposition Of InSb Thin Films With High Infrared Nonlinear Impact: Optical Approach

InSb thin films were prepared using a thermal evaporation method. X-ray powder diffraction (XRD) analysis shows that thin film as deposited was polycrystalline with cubic structure. The spectral behavior of transmission T(λ), reflection R(λ) and absorption Abs(λ) for Indium Selenide films in the spectra wavelength from 1100 nm to 2500 nm confirmed at room temperature. The linear optical parameters were determined as a function of wavelength. Also, the non-linear optical constants were calculated. The optical properties confirmed that Indium Selenide thin films have direct and indirect allowed transition type with energy gap Egdir =0.25 eV and Egind = 0.66 eV respectively.