IMPACT OF ERBIUM-DOPED ZINC TELLURITE GLASSES ON RAMAN SPECTROSCOPY, ELASTIC AND OPTICAL PROPERTIES

In this study, the melt-quenching technique was employed to fabricate a series of zinc tellurite glass systems doped with erbium oxide. At room temperature, raman spectroscopy, elastic and optical measurements were utilized to analyse and report the result of prepared glass samples. The raman spectra displays the existence of structural units of tellurite networks such as trigonal bipyramid and trigonal pyramid. The elastic parameters including Debye temperature, mean velocity, acoustic impedance and softening temperature provide a fluctuating trend against the concentration of erbium oxide. The increment and decrement of these parameters can be explained by the ‘competition’ of non-bridging and bridging oxygen atoms. In the aspect of optical approach, the oxide ion polarizability, optical basicity and metallization criterion display more than one trend. Again, this can be correlated to the presence of erbium oxide which affects the vicinity in the glass matrix.