VUV emission of Er3+ and Tm3+ in fluoride crystals

被引:32
作者
Becker, J
Gesland, JY
Kirikova, NY
Krupa, JC
Makhov, VN
Runne, M
Queffelec, M
Uvarova, TV
Zimmerer, G
机构
[1] PN Lebedev Phys Inst, Moscow 117924, Russia
[2] Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany
[3] Univ Maine, F-72017 Le Mans, France
[4] Inst Phys Nucl, F-91406 Orsay, France
[5] Moscow Gen Phys Inst, Moscow 117942, Russia
关键词
rare-earth ions; fluorides; 5d-4f luminescence; energy transfer;
D O I
10.1016/S0022-2313(97)00313-X
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
VUV emission of several fluoride crystals doped with Er3+ and Tm3+ has been studied under pursed synchrotron radiation excitation. It was shown that emission spectra of these ions in the 150-190 nm spectral range consist of both fast emission bands (decay constant in the range from a few to tens of nanoseconds) and slow ones (decay constant in the microsecond range). A model is proposed which explains the co-existence of the slow and fast components by the competition of the parity-allowed interconfiguration 4f(n-1)5d --> 4f(n) radiative transitions (fast emission) and parity-forbidden intraconfiguration 4f(n) --> 4f(n) transitions (slow emission). Depending on the relative position of corresponding emitting levels both fast and slow emissions, or only slow, or only fast emission are observed. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:91 / 96
页数:6
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