Luminescent properties and energy transfer processes of co-doped Yb–Er poly-crystalline YAG matrix |
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Authors: | S. Hinojosa, O. Barbosa-Garc a, M.A. Meneses-Nava, J.L. Maldonado, E. de la Rosa-Cruz,G. Ramos-Ortiz |
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Affiliation: | aCentro de Investigaciones en Optica, A.P. 1-980 Leon Gto., Mexico bUniversidad Autónoma de Zacatecas Zac., Mexico |
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Abstract: | A poly-crystalline YAG matrix was obtained through the precipitation method; this matrix was single and co-doped with ytterbium and erbium ions, i.e., Yb:YAG, Er:YAG and Yb,Er:YAG. It is found that the measured luminescent properties are similar to those reported for a mono-crystal YAG matrix. In addition, by studying the energy transfer processes in co-doped samples, it is shown that at high erbium concentrations the red emission is enhanced through an up-conversion process that takes place from the 4I13/2 to the 4F9/2 state of erbium ions. This enhanced red emission becomes comparable in intensity to the observed green emission and occurs by pumping at 800 nm through a back energy transfer process. |
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Keywords: | Spectroscopy Yb+3 Er+3 Energy transfer |
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