Zn:Fe:LiNbO_3晶体的生长及其光学性能的研究  

Growth and Optical Properties of Zn:Fe:LiNbO_3 Crystal

作　　者：赵朝中[1] 周玉祥[2] 张建[2] 荣宪伟[1] 徐玉恒[2] 

机构地区：[1]哈尔滨师范大学物理系,哈尔滨150080 [2]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《人工晶体学报》2004年第2期184-188,共5页Journal of Synthetic Crystals

基　　金：973(G19990330);863(2001AA31304);哈尔滨师范大学杰出青年基金;哈尔滨师范大学校基金项目

摘　　要：在LiNbO3中掺进ZnO和Fe2O3,以Czochralski技术生长Zn(7mol%):Fe(0.03%):LiNbO3,Zn(3mol%):Fe(0.03%):LiNbO3和Fe(0.03%):LiNbO3晶体。测试晶体的吸收光谱,Zn:Fe:LiNbO3晶体的吸收边相对Fe:LiNbO3晶体发生紫移。测试晶体的红外光谱,Zn(7mol%):Fe:LiNbO3晶体OH-吸收峰移到3529cm-1。测试晶体抗光致散射能力,Zn(3mol%):Fe:LiNbO3晶体抗光致散射能力比Fe:LiNbO3晶体提高一个数量级,Zn(7mol%):Fe:LiNbO3晶体比Fe:LiNbO3晶体高二个数量级。测试晶体的衍射效率和响应时间,Zn:Fe:LiNbO3晶体响应时间缩短,衍射效率降低。对吸收边和OH-吸收峰移动的机理,以及Zn:Fe:LiNbO3晶体抗光致散射能力增强的机理进行了研究。Zn(7mol%):Fe(0.03%):LiNbO_3,Zn(3mol%):Fe(0.03%):LiNbO_3 and Fe(0.03%):LiNbO_3 crystals were grown by Czochralski technique. The absorption spectra, infrared transmission spectra, the photo-damage resistance ability, diffraction efficiency and response time of the crystals were measured. Compared with Fe:LiNbO_3, the absorption edge of Zn:Fe:LiNbO_3 shifts to violet band, from 322 to 313nm at α=15cm^(-1). OH^- absorption peak of Zn:Fe:LiNbO_3 moves to 3529cm^(-1). The photo-damage resistance ability of Zn(3mol%):Fe:LiNbO_3 and Zn(7mol%):Fe:LiNbO_3 is over one and two orders of magnitude higher than that of Fe:LiNbO_3, respectively. The response time and diffraction efficiency of Zn:Fe:LiNbO_3 decrease. The mechanism of the shift of the absorption edge and OH^- absorption peak, the enhancement of the photo-damage resistance ability of Zn:Fe:LiNbO_3 was discussed.

关 键 词：晶体生长 光学性能 Zn:Fe:LiNbO3晶体 衍射效率 吸收光谱 抗光致散射能力 电光效应 

分 类 号：O734[理学—晶体学] O782