Spectroscopic properties of Er3+ ions in La2(WO4)3 crystal |
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| Affiliation: | 1. School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom;2. Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland;3. Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;4. Light Technology Institute (LTI), Karlsruhe Institute of Technology, Engesserstrasse 13, 76131 Karlsruhe, Germany;1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;2. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China;1. Center for Optical Materials and Technologies (COMT), Belarusian National Technical University, 65/17 Nezavisimosti Avenue, Minsk 220013, Belarus;2. N.S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninskii Prospekt, Moscow 119991, Russia;3. Departamento de Física, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain;1. Department of Chemical and Materials Engineering, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), CP 38008, 22453-900, Rio de Janeiro, RJ, Brazil;2. New Materials Laboratory, Department of Materials, Escuela Politécnica Nacional, 170525, Quito, Ecuador;1. Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, Poznań, 61-614, Poland;2. Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences in Bydgoszcz, Seminaryjna 3, Bydgoszcz, 85-326, Poland |
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| Abstract: | Er3+-doped La2(WO4)3 single crystals were grown by the Czochralski technique. The absorption spectra, fluorescence spectra and fluorescence decay curves of the crystals were measured at room temperature. The spectroscopic parameters, including intensity parameters Ωt (t = 2, 4, 6), spontaneous emission probability, fluorescence branching ratio, radiative lifetime, and stimulated emission cross-section were estimated. The fluorescence decay curves of fluorescence manifolds 4I13/2, 4I11/2, and 4S3/2 were measured for crystal and powder samples, respectively. The effect of radiation trapping on the spectroscopic parameters was discussed. Green up-conversion fluorescence bands centered at wavelengths of 530 nm and 550 nm were observed when the crystal was excited at 977 nm. The possible up-conversion mechanisms were proposed. |
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