铌酸锂晶体的光折变效应  

Photorefractive Effect of Lithium Niobate Crystals

作　　者：郑大怀 张宇琦 王烁琳 刘宏德 刘士国 孔勇发 薄方 许京军 ZHENG Dahuai;ZHANG Yuqi;WANG Shuolin;LIU Hongde;LIU Shiguo;KONG Yongfa;BO Fang;XU Jingjun(Key Laboratory of Weak Light Nonlinear Photonics,Ministry of Education,School of Physics&TEDA Institute of Applied Physics,Nankai University,Tianjin 300457)

机构地区：[1]南开大学物理科学学院&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》2022年第9期1626-1642,共17页Journal of Synthetic Crystals

基　　金：国家重点研发计划(2019YFA0705000);国家自然科学基金(12034010,12134007);天津市自然科学基金(21JCZDJC00300,21JCQNJC00250)。

摘　　要：铌酸锂(LiNbO_(3),LN)是一种多功能多用途的人工晶体,被称为“光学硅”。近期以铌酸锂薄膜(LNOI)为平台的集成光子学发展迅速,有将“光学硅”变为现实的趋势。高集成意味着高局域高光强密度,使铌酸锂晶体的光折变效应变得不容忽视。光折变效应是光致折射率变化的简称,是非线性光学的重要组成部分。本文回顾了铌酸锂晶体光折变效应的发现和机理、不同掺杂及掺杂组合对光折变效应的调控,重点介绍了铋镁双掺铌酸锂晶体的光折变性能及相关理论和实验结果,概述了铌酸锂光折变波导和孤子,及基于LNOI的集成光子学器件中的光折变效应,并对未来的研究趋势进行了展望。期待我国发挥铌酸锂光折变研究及LNOI产业化的优势,在光子学芯片的竞争中占据主导地位。Lithium niobite(LiNbO_(3),LN)is a kind of multi-functional artificial crystal,which is called“optical silicon”.Recently,the rapid development of integrated photonics based on LN film(LNOI)has a great tendency to turn“optical silicon”into reality.High integration means high local intensity density,so the photorefractive effect of LN crystal can’t be ignored any more.Photorefractive effect,short for photoinduced refractive index change,which is an important part of nonlinear optics.In this paper,the discovery and mechanism of photorefractive effect,the regulation of photorefractive effect by different dopants and doping combinations are reviewed.The photorefractive characteristics of bismuth-magnesium double-doped LN crystal,related theoretical and experimental results are mainly introduced.The characteristics and applications of LN photorefractive waveguide,optical soliton,and the photorefractive effect in LNOI-based integrated photonics devices are summarized.The future research trends are also prospected.It is expected that China will make full use of the advantages of LN photorefraction research and LNOI industrialization and occupy the advantage in the competition of photonics chips.

关 键 词：铌酸锂晶体 光折变效应 机制 掺杂 全息存储及显示 集成光子学 

分 类 号：O734[理学—晶体学]