Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5397501 | Journal of Luminescence | 2017 | 8 Pages |
Abstract
Terbium (Tb3+) ions are promising for the development of visible lasers. We report on the spectroscopy of Tb3+ in the monoclinic KYb(WO4)2 (KYbW) crystal, including the Judd-Ofelt (J-O) modelling of the transition probabilities, evaluation of the absorption and stimulated-emission (SE) cross-sections with polarized light, and emission lifetime study. Within the strong configuration interaction (SCI) approximation of the J-O theory, the intensity parameters of Tb3+ are Ω2 =0.864, Ω4 =1.657, Ω6 =1.975 [10-20 cm2] and Î=38810 cm-1. The maximum Ïabs for the 7F6 â 5D4 transition reaches 2.3Ã10-21 cm2 at 486.7 nm and the maximum ÏSE for the green emission according to the 5D4 â 7F5 transition is 2.3Ã10-21 cm2 at 549.3 nm (both for E || Nm). The measured lifetime of the 5D4 state for a 1 at% Tb3+ doping is 395±5 μs. Under blue excitation, Tb: KYbW exhibits intense green emission with the CIE 1931 coordinates of (0.312; 0.644).
Related Topics
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Physical and Theoretical Chemistry
Authors
Pavel Loiko, Xavier Mateos, Elena Dunina, Alexey Kornienko, Anna Volokitina, Elena Vilejshikova, Josep Maria Serres, Alexander Baranov, Konstantin Yumashev, Magdalena Aguiló, Francesc DÃaz,