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Title

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

AuthorsMiguel, A.; Morea, Roberta ; Gonzalo de los Reyes, José; Fernández, Joaquín ; Balda, Rolindes
KeywordsRare-earth-doped materials
Laser materials.
Spectroscopy, time-resolved
Nanocrystalline glass-ceramics
Issue Date16-Mar-2015
PublisherThe International Society for Optics and Photonics
CitationProceedings of SPIE - The International Society for Optical Engineering 9359: 93590X-1- 93590X-10 (2015)
AbstractIn 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
Description10 págs.; 11 figs.; invited paper
Publisher version (URL)http://dx.doi.org/10.1117/12.2075584
URIhttp://hdl.handle.net/10261/130636
DOI10.1117/12.2075584
Identifiersdoi: 10.1117/12.2075584
issn: 0277-786X
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