Structural Characterization and Compositional Dependence of Optical Properties of Ge16Se52Te32-x Sb x (x=0, 2, 4, 6, 8) Glassy Alloys

Antimony-substituted Ge-Se-Te quaternary chalcogenide glasses have been synthesized using the melt quench technique. The bonding arrangements in the glassy matrices have been studied through infrared spectra in the spectral region from 50 cm(-1) to 300 cm(-1). The effect of Sb addition on the optical properties has also been studied using ultraviolet-visible-infrared (UV-Vis-IR) spectroscopy on thin films of uniform thickness. The materials possess high refractive index and tunable bandgap with low values of optical loss. They also possess good infrared transparency regions, high refractive index, and low optical bandgap, making them suitable for use in photonic applications.