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Título: | Down- and up-conversion emissions in Er-doped transparent fluorotellurite glass-ceramics |
Autor: | Miguel, A.; Morea, Roberta CSIC; Gonzalo, J. CSIC ORCID; Fernández, Joaquín CSIC ORCID; Balda, Rolindes CSIC ORCID | Palabras clave: | Rare-earth-doped materials Laser materials Spectroscopy, time-resolved Nanocrystalline glass-ceramics |
Fecha de publicación: | 16-mar-2015 | Editor: | The International Society for Optics and Photonics | Citación: | Proceedings of SPIE - The International Society for Optical Engineering 9359: 93590X-1- 93590X-10 (2015) | Resumen: | In this work, we report the near infrared and upconversion emissions of Er3+-doped transparent fluorotellurite glass- ceramics 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 4F9/2¿4I15/2 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. © 2015 SPIE | Descripción: | 10 págs.; 11 figs.; invited paper | Versión del editor: | http://dx.doi.org/10.1117/12.2075584 | URI: | http://hdl.handle.net/10261/130636 | DOI: | 10.1117/12.2075584 | Identificadores: | doi: 10.1117/12.2075584 issn: 0277-786X |
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