Optical Basicity and Electronic Polarisability of Zinc Tellurite Glass System Doped with Sm3+ ions

Abstract

Zinc tellurite glass system doped with samarium oxide were prepared using a melt quenching technique. The analysis of X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) were employed to obtain the structural properties. The XRD result revealed the amorphous nature of the sample glasses. The density of the glass system increases with increase in dopant. The refractive index was obtained using the proposed relation of   Sakka and Dimitrov. The values of theoretical electronic polarisability, polarisability of oxide ion and metallization criterion of the glass system were obtained via the equation of Lorenz-Lorenz. The band gap energy and refractive index based optical basicity were calculated by the Duffy and Ingram relation. The refractive index and energy band gap-based metallization criterion showed an increasing trend with increasing Sm2O3 concentration. Urbach energy decreases with an increase in dopant concentration. The decreasing Urbach energy confirmed that the glass samples have a higher tendency to reduce static disorder within its structure. The obtained result showed that the sample glasses have all potentials to be used on optical limiting devices for photonics.