Emission decay times of F3+ and F2 color centers in LiF crystals

被引:12
作者
Baldacchini, G
De Matteis, F
Francini, R
Grassano, UM
Menchini, F
Montereali, RM
机构
[1] CR Frascati, Dipartimento Innovaz, ENEA, I-00044 Frascati, Italy
[2] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy
[3] Univ Roma Tor Vergata, INFM, I-00133 Rome, Italy
关键词
lithium fluoride; color centers; emission; lifetime;
D O I
10.1016/S0022-2313(99)00301-4
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
F-3(+) and F-2 centers in LiF display efficient broad emissions in the green-red spectral region when excited in their absorption bands located around 450 nm. Recently it has been shown that color centers, impurities and low-dimensionality structures in heavily colored samples influence the optical cycles and in particular the lifetimes of the emitting states. In order to determine these effects we measured the decay times, which are reported in the literature with values scattered by more than a factor 4. We obtained the radiative lifetime tau(0) = (8.1 +/- 1.2) ns for F-3(+) and tau(0) = (15.5 +/- 0.8) ns for F-2 centers and we did not observe any temperature dependence in the range 15-300 K. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:580 / 582
页数:3
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