Growth and optical properties of Zn:Ce:Cu:LiNbO₃ single crystals

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• 作者：Decai Ma ; Biao Wang ; Rui Wang ; Yuan Wei ; Hong Cheng Liu ; Hai Wang
• 关键词：Zn ; Ce ; Cu ; LiNbO₃ ; Infrared absorption spectra ; Ultraviolet– ; visible absorption spectra ; Photorefractive properties ; Light-induced scattering
• 刊名：Solid-State Electronics
• 出版年：2008
• 期刊代码：73_00381101
• 类别：ph
• 出版时间：May 2008
• 卷：52
• 期：5
• 页码：644-648
• 文件大小：172 K

摘要

A series of congruent crystals Zn:Ce:Cu:LiNbO₃ crystals doped with Zn(0, 3, 5, 7 mol%) were grown by using Czochralski method. OH⁻ vibrational band and fundamental absorption edge were used to deduce the defect structure. Photorefractive properties were measured by two-wave coupling and light induced scattering experiments. It was found that the response and erasure time shorten with the increase of Zn doping concentration, whereas threshold intensity to optical damage of Zn(7 mol%):Ce:Cu:LiNbO₃ was two orders of magnitude higher than that of Ce:Cu:LiNbO₃. In this paper, site occupation mechanism of impurities were also discussed to explain the high resistance ability to optical damage and fast response speed in the Zn:Ce:Cu:LiNbO₃ crystal.