Structural and Optical Characteristics of Erbium Doped Ternary TeO₂-TiO₂-Bi₂O₃ Glasses

Abstract:

In this work we investigated both structural and optical characteristic of erbium doped ternary TeO₂-TiO₂-Bi₂O₃ tellurite oxide based glasses, synthesized via melt-quench method. The X-ray diffraction (XRD) and differential scanning calorimetry (DSC) confirmed its glassy nature and stability. Raman analysis revealed the presence of various coordination state TeO₂ network consisting stretching/bending vibrations of Te-O bonds in the [TeO₄] trigonal bi-pyramid units and fraction of [TeO₃, TeO₃₊₁] trigonal pyramids. From optical absorption measurement both optical band gap and Judd-Ofelt analysis (intensity parameters Ω_{t (t=2, 4, 6)}, transition probabilities, and radiative lifetimes of the Er³⁺ ions) have been performed for both host and doped glasses respectively. Photoluminescence studies for upconversion and near-infrared emissions analysis (under 980 nm excitation at room temperature. Both optical transition mechanism which involved nonradiative energy transfer between Er³⁺ ions through cross-relaxation and energy migration were also explained in detailed.

• Periodical: Solid State Phenomena (Volume 268)
• Pages: 148-154
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.268.148
• Online since: October 2017
• Authors: S.O. Baki*, L.S. Tan, C.S. Kan, Mohamed Kamari Halimah, M.A. Mahdi
• Keywords: Erbium Doped, Judd-Ofelt Analysis, Near Infra-Red, Photoluminescence, RAMAN, Tellurite Glass

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