铁铪双掺铌酸锂晶体的光致散射研究  

Study on the Light-induced Scattering in LiNbO_3 Crystals Double Doped with Fe and Hf

作　　者：陈洪建[1] 张维连[1] 阎文博[1] 李养贤[1] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《人工晶体学报》2009年第2期506-509,524,共5页Journal of Synthetic Crystals

基　　金：河北省自然科学基金(No.F2007000119);河北省教育厅科研计划(No.2008113);天津市自然科学基金(No.09JCYBJC02400)

摘　　要：本文研究了铁铪双掺铌酸锂晶体的光致散射行为,对比了铁铪双掺铌酸锂晶体还原前后的光致散射结果。结果表明:晶体中的锂空位可使晶体暗电导增加并引起光致散射的泵浦光强阈值效应;高泵浦光强下产生的严重光致散射起源于晶体中的较高的三价铁离子浓度。铁铪双掺铌酸锂晶体具有较好的抑制光致散射的能力。Light-induced scattering in LiNbO3 ： Fe crystals double doped with Fe and Hf was studied in this paper. The results of Light-induced scattering before and after reduction were contrasted. The results show that dark conductivity increased and the threshold effect of the pump light intensity for the light-induced scattering occured becasuse of the Li vacancies. Serious light-induced scattering at high pump intensity could be attributed to the high Fe^3＋ concentration in the crystals. The LiNbO3 ： Fe, Hf crystals exhibit a good ability to suppress the light-induced scattering.

关 键 词：铌酸锂 光致散射 阈值效应 

分 类 号：O73[理学—晶体学]