Luminescence of Er³⁺/Nd³⁺ Co-Doped Lithium Niobate Tellurite Glass

Abstract:

Achieving tuneable photoluminescence via controlled co-doping of rare earth ions in lithium niobate based glasses are challenging. A series of Er³⁺/ Nd³⁺ co-doped tellurite glasses of composition (70-x-y) TeO₂ – 15 Li₂CO₃ – 15 Nb₂O₅ – (x) Er₂O₃ – (y) Nd₂O₃ with x = 0; 1.0 mol % and 0 ≤ y ≤ 1.0 mol % are prepared using melt quenching technique. The influence of co-dopants on the emission properties is analyzed and discussed using partial energy level diagram of rare earth ions. The dopants concentration dependent physical properties such as refractive index, molar volume, density, polarizability and molar refractions are determined. The down-converted luminescence spectra for ²G_9/2 à⁴I_9/2 transition reveal a strong green emission band centred at 497 nm is attributed to the energy transfer from erbium to neodymium ion. The emission spectra exhibit five prominent peaks centred at 497, 539, 553, 616 and 634 nm corresponding to the transitions from ²H_11/2, ⁴S_3/2 and ⁴F_9/2 excited states to the ground state of Er³⁺ ion and the transitions from ²G_9/2, ²G_7/2, ²H_11/2 and ⁴F_9/2 excited states to ground state of Nd³⁺ ion. The highest intensity is achieved for x = y = 1.0 mol%. The excellent luminescence response suggests that our glasses may be nominated for solid state lasers and other photonic applications.

• Periodical: Materials Science Forum (Volume 846)
• Pages: 131-136
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.846.131
• Online since: March 2016
• Authors: Hasim Nurhafizah, Md Supar Rohani*, M.R. Sahar, Sib Krishna Ghoshal
• Keywords: Luminescence Quenching, Melt Quenching, Photoluminescence (PL)

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