期刊
PHYSICS LETTERS A
卷 330, 期 3-4, 页码 291-298出版社
ELSEVIER
DOI: 10.1016/j.physleta.2004.07.071
关键词
CaWO4 : Eu,Tb; optical properties; polarization rules; luminescence
The Letter is devoted to the problem of the optical anisotropy of the rare-earth ions occupying low-symmetry positions in crystals. The crystal field multiplets arising from LSJ terms of Eu3+ and Tb3+ ions in the crystal field of calcium tungstate scheelite (CaWO4) are analyzed with regard to the experimental data on the low temperature photoluminescence and cathodo-luminescence spectra. The selection rules as well as an angular (polarization) dependence of the two-photon absorption are discussed. (C) 2004 Elsevier B.V. All rights reserved.
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