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Luminescence spectroscopy of Er-doped and Er, Yb-codoped LaPO4 single crystals |
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| Authors: | Rados?aw Lisiecki Witold Ryba-Romanowski Marco Bettinelli |
| Institution: | a Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroc?aw, Poland b DiSTeMeV, University of Verona and INSTM, UdR Verona, Via della Pieve 70, 37029 San Floriano (Verona), Italy c DST, University of Verona and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy |
| Abstract: | LaPO4 single crystals lightly doped with Er3+, and codoped with Er3+ and Yb3+ have been grown by spontaneous nucleation in a lead phosphate flux. Absorption and luminescence spectra have been measured in the visible and near-IR regions and the excited state dynamics has been studied upon pulsed laser excitation. The obtained results have allowed the evaluation of the effective emission cross-sections around 1.5 μm, that have been found to be similar to important oxide laser crystals doped with Er3+. Efficient visible upconversion has been observed upon excitation at 980 nm in the codoped crystals. This behaviour is attributed to Yb3+-Er3+ energy transfer processes. |
| Keywords: | 42 55 Xi 42 62 Fi |
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