双掺(V,Cr):KNSBN晶体光诱导吸收研究  

Light-induced Absorption in Double-doped (V,Cv) Potassium Sodium Strontium Barium Niobate

作　　者：张曰理[1] 李辉遒[1] 阳生红[1] 莫党[1] 

机构地区：[1]中山大学凝聚态物理研究所/物理学系,广东广州510275

出　　处：《中山大学学报（自然科学版）》2000年第4期43-46,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省自然科学基金资助项目!(980 36 4 )

摘　　要：成功地生长、制备出了双掺 (V ,Cr)钾钠铌酸锶钡晶体样品 .测量了不同光强和光偏振下的光诱导吸收变化 .实验结果显示 ,双掺 (V ,Cr)钾钠铌酸锶钡晶体具有很高的光诱导吸收系数 ,其值高达 3cm- 1 ,且光诱导吸收依赖于泵浦束光强和探测束光偏振 .对实验结果用两中心电荷传输模型进行了解释 .The double-doped (V,Cr) potassium sodium strontium barium niobate crystal sample has been successfully grown and prepared. Measurements of light-induced absorption changes in double-doped (V,Cr)-potassium sodium strontium barium niobate crystal are carried out for different intensities and polarization. It is observed that the light-induced absorption coefficient of the sample depends on the intensity of the pump light beam and the polarization of the probe light beam.A variation as high as 3 cm- -1 of the light-induced absorption coefficient is measured.The results are interpreted in terms of a two-center charge transport model.

关 键 词：光折变晶体 钾钠铌酸锶钡 光诱导吸收 KNSBN晶体 

分 类 号：O734.1[理学—晶体学]