Photorefractive properties of lithium niobate single crystals doped with copper

被引：0
|
作者：
N. V. Sidorov
A. A. Yanichev
A. A. Gabain
M. N. Palatnikov
A. N. Smirnov
机构：
[1] Russian Academy of Sciences,I. V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials
[2] Kola Science Center,A. F. Ioffe Physical Technical Institute
[3] Russian Academy of Sciences,undefined
来源：
Journal of Applied Spectroscopy | 2013年 / 80卷
关键词：
Raman scattering; ultraviolet, visible, and near infrared; stoichiometric, congruent, Cu-doped lithium niobate single crystals; photorefractive effect; defects; charge exchange of Cu cations;
D O I：
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中图分类号：
学科分类号：
摘要：
Raman scattering with excitation in the ultraviolet, visible, and near infrared and electron paramagnetic resonance are used to study the photorefractive properties of nominally pure, stoichiometric (R = Li/Nb = 1) single crystals of lithium niobate grown from a melt with 58.6 mol% Li2O (LiNbO3stoich), nominally pure crystals with a congruent composition (LiNbO3congr, R = 0.946), and Cu-doped crystals with a congruent composition (LiNbO3:Cu, [Cu] = 0.015 mass%). Optical irradiation is found to cause charge exchange of copper cations, Ca2+ → Cu, in the LiNbO3:Cu ([Cu] = 0.015 mass%) crystals. Thus, crystalline LiNbO3:Cu ([Cu] = 0.015 mass%) manifests photorefractive properties as a result of charge exchange of copper ions during laser irradiation, in addition to the contribution from intrinsic defects with localized electrons previously observed in LiNbO3stoich and LiNbO3congr.
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页码：226 / 231
页数：5
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