Down- and up-conversion emissions in Er-doped transparent fluorotellurite glass-ceramics

A. Miguel; R. Morea; J. Gonzalo; J. Fernandez; R. Balda

doi:10.1117/12.2075584

16 March 2015 Down- and up-conversion emissions in Er-doped transparent fluorotellurite glass-ceramics

A. Miguel, R. Morea, J. Gonzalo, J. Fernandez, R. Balda

Proceedings Volume 9359, Optical Components and Materials XII; 93590X (2015) https://doi.org/10.1117/12.2075584
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

In this work, we report the near infrared and upconversion emissions of Er³⁺-doped transparent fluorotellurite glassceramics obtained by heat treatment of the precursor Er-doped TeO₂-ZnO-ZnF₂ glass. Structural analysis shows that ErF₃ nanocrystals nucleated in the glass-ceramic sample are homogeneously distributed in the glass matrix with a typical size of 45±10 nm. The comparison of the fluorescence properties of Er³⁺-doped precursor glass and glass-ceramic confirms the successful incorporation of the rare-earth into the nanocrystals. An enhancement of the red upconversion emission due to ⁴F_9/2→⁴I_15/2 transition together with weak emission bands due to transitions from ²H_9/2, ⁴F_3/2,_5/2, and ⁴F_7/2 levels to the ground state are observed under excitation at 801 nm in the glass-ceramic sample. The temporal evolution of the red emission together with the excitation upconversion spectrum suggest that energy transfer processes are responsible for the enhancement of the red emission.

Citation Download Citation

A. Miguel, R. Morea, J. Gonzalo, J. Fernandez, and R. Balda "Down- and up-conversion emissions in Er-doped transparent fluorotellurite glass-ceramics", Proc. SPIE 9359, Optical Components and Materials XII, 93590X (16 March 2015); https://doi.org/10.1117/12.2075584

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