Photorefraction in LiNbO3 as a function of [Li]/[Nb] and MgO concentrations

被引：180

作者：

Furukawa, Y ^{[1
]}

Kitamura, K ^{[1
]}

Takekawa, S ^{[1
]}

Miyamoto, A ^{[1
]}

Terao, M ^{[1
]}

Suda, N ^{[1
]}

机构：

[1] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 16期

关键词：

D O I：

10.1063/1.1318721

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photorefractive damage, photoconductivities, and photogalvanic currents of LiNbO3 single crystals have been investigated as a function of [Li]/[Nb] and MgO concentrations. Near stoichiometric LiNbO3 single crystal, having large [Li]/[Nb] ratios of 0.993, shows lower photorefractive damage resistance than congruent LiNbO3. However, crystals doped with a small amount of MgO (> 0.78 mol %) exhibit no measurable photorefractive damage at 532 nm to intensities of as much as 2 MW/cm(2). This remarkable decrease of photorefraction that was found can be attributed to the decrease of saturated space charge field results from a combination of the increased photoconductivity and the decreased photogalvanic current of the crystal. (C) 2000 American Institute of Physics. [S0003-6951(00)02142-2].

引用

页码：2494 / 2496

页数：3

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