双掺钾钠铌酸锶钡晶体光学特性研究  

OPTICAL PROPERTIES IN KNSBN CRYSTAL MATERIALS

作　　者：张曰理[1] 阳生红[1] 李辉遒[1] 莫党[1] 

机构地区：[1]中山大学凝聚态物理研究所物理系,广东广州510275

出　　处：《红外与毫米波学报》2001年第1期47-49,共3页Journal of Infrared and Millimeter Waves

基　　金：广东省自然科学基金资助项目&&

摘　　要：成功地生长、制备出了双掺 (Cu,Ce)钾钠铌酸锶钡晶体样品 .测量了双掺 (Cu,Ce)钾钠铌酸锶钡晶体在红光波段的二波耦合特性及其光诱导吸收变化 .实验结果显示 ,双掺 (Cu,Ce)钾钠铌酸锶钡晶体在红光波段具有好的光折变性能 ,其红光波段的二波耦合增益可达 10 cm- 1 ;且存在着较强的光诱导吸收现象 ,其光诱导吸收变化明显地依赖于泵浦束光强和探测束光偏振 ,探测束偏振方向平行晶体 c轴时的光诱导吸收系数和探测束偏振方向垂直于晶体 c轴时的光诱导吸收系数分别达 0 .5 3cm- 1 和 0 .2 6 cm- 1 。KNSBN crystals were grown successfully with both Cu & Ce dopings. Two-wave mixing experiments and light-induced absorption changes experiments in (Cu,Ce):KNSBN crystals were carried out. The two-wave coupling gain was measured to be as large as 10cm(-1). (Cu,Ce):KNSBN exhibits strong intensity and polarization-dependent absorptions at red wavelength. Light-induced absorption coefficients of up to 0. 53cm(-1) and 0. 26cm(-1) were obtained using an Ar laser pump beam for the extraordinary and ordinary probe beams, respectively. The results indicate that the two-center charge transport model is more appropriate for KNSBN.

关 键 词：钾钠铌酸锶钡 光诱导吸收 铜铈双掺杂 二波耦合 光学特性 光折变晶体材料 

分 类 号：O734.1[理学—晶体学]