LIGHT-INDUCED ABSORPTION CHANGES IN IRON-DOPED LINBO3

被引:24
作者
SIMON, M
JERMANN, F
KRATZIG, E
机构
[1] Fachbereich Physik, Universität Osnabrück, D-49069 Osnabrück
关键词
D O I
10.1016/0925-3467(94)90036-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
LiNbO3:Fe and LiNbO3:Fe,Me (Me = K, Mg, Zn) crystals are illuminated with frequency-doubled pulses of a e-switched Nd:YAG laser. We detect light-induced absorption changes at high pulse intensities (I > 10(9)Wm(-2)) utilizing cw probe lasers of different wavelengths (lambda(p) = 488, 633, and 785 nm). Intensity dependences as well as relaxation processes after illumination are investigated. Absorption changes increase with increasing light intensity. Strongest effects are observed in reduced crystals. Doping with magnesium or zinc and an increasing lithium content, respectively, diminishes light-induced absorption changes. Our results can be described by a two-center charge transport model.
引用
收藏
页码:243 / 250
页数:8
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