16 March 2015 Down- and up-conversion emissions in Er-doped transparent fluorotellurite glass-ceramics
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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
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 4F9/24I15/2 transition together with weak emission bands due to transitions from 2H9/2, 4F3/2,5/2, and 4F7/2 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.
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A. Miguel, R. Morea, J. Gonzalo, J. Fernandez, 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); doi: 10.1117/12.2075584; https://doi.org/10.1117/12.2075584

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