Spectral-kinetic studies of SrAlF5 doped by trivalent rare-earth ions

被引：2
|
作者：
Yunusova, A. N. [1 ]
Marisov, M. A. [1 ]
Semashko, V. V. [1 ]
Nurtdinova, L. A. [1 ]
Korableva, S. L. [1 ]
机构：
[1] Kazan Fed Univ, Kazan 420008, Russia
来源：
OPTICS COMMUNICATIONS | 2012年 / 285卷 / 18期
关键词：
Laser spectroscopy; Color centers; Rare-earth ions; UV active media; Fluoride crystals; CE3+;
D O I：
10.1016/j.optcom.2012.05.025
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Photochemical properties of Ce3+:SrAlF5 and Ce3+,Yb3+:SrAlF5 single crystals together with spectroscopic and kinetic characteristics of several optically nonequivalent impurity centers and energy transfer between them are described. It is shown that co-activation by Yb3+ ions effectively suppresses color centers in Ce,Yb:SAF crystals. It was found out that in Ce,Yb:SAF crystals Yb ions exist simultaneously in 2+ and 3+ valent state. Three types of optically nonequivalent luminescent centers corresponding to the doublets in luminescence spectrum centered at 290, 305 and 370 nm (e(I), Ce-II, Ce-III, respectively) have been observed. Analysis of luminescence spectra and decays leads to the conclusion that there is no energy transfer between either cerium centers or from Ce3+ to Yb2+ apart from the Ce-III center which luminescence is slightly quenched by Yb2+. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：3832 / 3836
页数：5
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