Polarizability, optical basicity and electric susceptibility of Er3+ doped silicate borotellurite glasses

• Published in: Journal of non-crystalline solids Vol. 471; pp. 101 - 109
• Main Authors: Umar, S.A., Halimah, M.K., Chan, K.T., Latif, A.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-09-2017
• Subjects: Erbium; Linear electric susceptibility and metallization criterion; Optical basicity; Polarizability; Linear electric susceptibility and metallization criterion; Polarizability; Erbium; Optical basicity
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2017.05.018

Glasses system was fabricated using the chemical composition {[(TeO2)0.7 (B2O3)0.3]0.8 (SiO2)0.2}1−x (Er2O3)x with x=0.01, 0.02, 0.03, 0.04 and 0.05 by melt-quenching method. The glasses were subjected to FTIR and XRD to study the glass structural changes and amorphous nature respectively. The absorption spectrum of the glasses were obtained from UV–Vis spectroscopy and used to calculate the energy band gap. Using the Archimedes principle, the density and the molar volume were determined. From the density, molar volume, and energy band gap, other parameters such as refractive index, molar refractive index, metallization criterion, reflection loss, transmission coefficient, polarizability, optical basicity, polaron radius, dielectric constant, optical dielectric constant, electric susceptibility, average electronegativity and others parameters were obtained by calculation. The polarizability values and the optical basicity were found to increase with Er3+ ions concentration increase. The dielectric constant, optical dielectric constant and the linear electric susceptibility decreased with increase in Er3+ ions concentration. The properties studied for the erbium doped glass system suggest the glass system has a potential in the EDFA application.
•Erbium doped silicate borotellurite glasses possess high refractive indices.•The polarizability of the Erbium doped silicate borotellurite glasses increases with increase in the erbium ion concentration.•Increase in the erbium concentration increases the optical basicity of the glasses.•Effective bandwidth in the C and L-band region is broadened by increase in the Er3+ ion concentration.