Elastic and optical properties of GexSe2Sb1-x (0.0 ≤ x ≤ 1.0) glasses

Abstract

The present study deals with the effect of composition on the elastic and optical properties of GexSe2Sb1-x(0.0 ≤ x ≤ 1.0) glasses. The various elastic moduli of these glasses such as Young's modulus (Y) and the bulk modulus (B) along with the micro-hardness (H), Poisson's ratio (σ) and Debye temperature (TD) were obtained from the values of the longitudinal (vl) and shear (vs) ultrasonic velocities. On the basis of measurements of the transmittance and reflectance spectra in the wavelength range of 0.4-2.5 m the optical constants such as the film thickness (t), the refractive index (n) and the optical band gap (Eg) were investigated with high accuracy. The optically determined bulk modulus of these glasses was in good agreement with that elastically investigated. The obtained results were discussed in terms of the changes in the glass density, electronegativity and electronic polarizability with the variation in antimony content.