掺钼近化学计量比铌酸锂晶体的光折变性能研究  

Study on Photorefractive Properties of Near-Stoichiometric Lithium Niobate Crystals Doped with Molybdenum

作　　者：薛丽云 刘宏德[1] 郑大怀 Saeed Shahzad 于洪 刘士国[1] 陈绍林 张玲 孔勇发[1,2] 许京军 XUE Liyun;LIU Hongde;ZHENG Dahuai;SAEED Shahzad;YU Hong;LIU Shiguo;CHEN Shaolin;ZHANG Ling;KONG Yongfa;XU Jingjun(School of Physics,Nankai University,Tianjin 300071,China;MOE Key Laboratory of Weak-light Nonlinear Photonics,TEDA Institute of Applied Physics,Nankai University,Tianjin 300457,China)

机构地区：[1]南开大学物理科学学院,天津300071 [2]南开大学泰达应用物理研究院,弱光非线性光子学教育部重点实验室,天津300457

出　　处：《人工晶体学报》2020年第1期21-26,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(11674179,61705116)

摘　　要：通过生长一系列掺钼近化学计量比铌酸锂晶体,研究了晶体的光折变性能,发现在488 nm和532 nm波长辐照下,当Mo的掺入量为0.5mol%时,晶体的光折变灵敏度分别达到0.25 cm/J和0.21 cm/J。此外,极化条件的改变可以缩短晶体在488 nm波长辐照下的光折变响应时间。通过红外光谱、紫外可见吸收光谱和X射线光电子能谱的测试,对掺钼近化学计量比铌酸锂晶体的光折变性能变化的机制进行了研究。A series of near-stoichiometric lithium niobate crystals doped with molybdenum(n SLN∶Mo)were grown,and their photorefractive properties were investigated.The experimental results show that the photorefractive sensitivity of n SLN∶Mo doping with 0.5 mol%molybdenum reaches 0.25 cm/J and 0.21 cm/J with 488 nm and 532 nm laser,respectively.And the response time of n SLN∶Mo crystal at 488 nm can be further shortened by changing polarization condition.The results of infrared spectrum,ultraviolet-visible absorption spectrum and X-ray photoelectron spectroscopy reveal the reason for the change of photorefractive performance of n SLN∶Mo crystals.

关 键 词：近化学计量比铌酸锂晶体 全息存储 光折变 

分 类 号：O734.1[理学—晶体学]