Assessment of optical and structural property of (Ge11.5Te12.5Se67.5)100 and (Ge11.5Te12.5Se67.5)90Sb10 glasses for photonic application

Ge-Se-Te-Sb glasses were obtained by well-known melt-quench technique to investigate the doping effect on structural and optical properties of the prepared glass samples. It was observed that adding Sb in Ge-Se-Te glasses, the glass transition temperature decreases from 100.42° C to 78.02° C. Addition of Sb changes the glass network which cause an apparent impact on the properties of glasses. Substituting Sb into Ge-Se-Te matrix improves the thermal stability of chalcogenide glasses. The absorption coefficient and optical bandgap increases by addition of Sb while the extinction coefficient decreases.