KNSBN:V晶体材料制备及光诱导吸收研究  

Preparation and Light-induced Absorption of KNSBN: V Crystal Materials

作　　者：张曰理[1] 李辉遒[1] 阳生红[1] 莫党[1] 

机构地区：[1]中山大学凝聚态所物理系,广东广州510275

出　　处：《功能材料》2000年第4期423-425,共3页Journal of Functional Materials

基　　金：广东省自然科学基金!(980364)

摘　　要：成功地生长、制备出了一系列合不同掺钒浓度的钾钠铌酸锶钡（ＫＮＳＢＮ：Ｖ）晶体样品。测量了在不同光强、光偏振和掺钒浓度下 ＫＮＳＢＮ晶体的光诱导吸收变化。实验结果显示，ＫＮＳＢＮ：Ｖ晶体存在较强的光诱导吸收，且其光诱导吸收变化明显依赖于泵浦束光强，探测束光偏振和晶体的掺钒量，对于探测束光偏振平行和垂直于ｃ轴的情况，其值分别可达０．５５和 ０． ２２ｃｍ－１。对实验结果进行了解释。We have successfully.grown and prepared KNSBN crystal samples with different V concentrations in our experiment. Measurements of light-induced absorption changes in KNSBN: V crystals were carried out for different intensities. polarization and V concentrations. We find that the light- induced absorption change depends on the intensity of the pump light beam, polarization of the probe light beam and V concentrations. We got variation as high as 0. 55 and 0. 22cm-1 in the light-induced absorption coefficient for the extraordinary and ordinary probe beams, respectively. The results were interpreted in terms of a two- center charge transport model.

关 键 词：光折变材料 钾钠铌酸锶钡 光诱导吸收 

分 类 号：O734[理学—晶体学] TM221[一般工业技术—材料科学与工程]