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Stoichiometric LiTaO3 for dynamic holography in near UV wavelength range

被引：24
作者：
Furukawa, Y
Kitamura, K
Niwa, K
Hatano, H
Bernasconi, P
Montemezzani, G
Günter, P
机构：
[1] Natl Inst Res Inorgan Mat, Tsukuba, Ibaraki 3050044, Japan
[2] NGK Spark Plug Co Ltd, Komaki 4858510, Japan
[3] Pioneer, Corp R&D Lab, Tsurugashima 3502288, Japan
[4] ETH Honggerberg, Inst Quantum Elect, CH-8093 Zurich, Switzerland
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 3B期
关键词：
lithium tantalate; single crystal; stoichiometry; double crucible Czochralski; photorefractive effect; photoconductivity; photogalvanic effect; holography;
D O I：
10.1143/JJAP.38.1816
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
LiTaO3 single crystals with near-stoichiometric composition are grown using a double crucible Czochralski method equipped with an automatic powder supply system, Their photorefractive properties are compared with those of LiTaO3 crystals grown from the congruent composition melt. Two beam coupling experiments show that nearly stoichiometric LiTaO3 crystals exhibit considerably higher photorefractive gain, speed and sensitivity than conventional congruent crystals. Due to the relatively large photoconductivity observed at near UV wavelengths, stoichiometric crystals are further characterized by small photogalvanic fields, making them very attractive for dynamic holography in this wavelength range.
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页码：1816 / 1819
页数：4
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