近化学计量比Cu：Fe：LiNbO3晶体的生长及蓝光优化光折变性能  

Growth and Blue Photorefractive Properties of Near-Stoichiometric Cu:Fe:LiNbO_3 Crystals

作　　者：王义杰[1] 莫阳[1] 文爱花[2] 徐超[2] 冷雪松[2] 张春雷[3] 许磊[2] 徐玉恒[2] 

机构地区：[1]哈尔滨理工大学应用科学学院,哈尔滨150080 [2]哈尔滨工业大学化工学院,哈尔滨150001 [3]东北林业大学,生物质材料科学与技术教育部重点实验室,哈尔滨150040

出　　处：《硅酸盐学报》2011年第2期355-358,364,共5页Journal of The Chinese Ceramic Society

基　　金：黑龙江省教育厅科学研究基金(11551099)资助项目

摘　　要：以K2O为助溶剂在LiNbO3中掺入0.15%(质量分数,下同)CuO,0.03%和0.05%Fe2O3,用顶部籽晶溶液生长法生长近化学计量比Cu:Fe:LiNbO3晶体。以Ar+激光器的488 nm激光为光源测试Cu:Fe:LiNbO3晶体的光激载流子类型,采用二波耦合光路测试了晶体的光折变存储性能,并与633 nm红光测试的Fe:LiNbO3的存储性能进行了比较。结果表明:Cu:Fe:LiNbO3晶体光激载流子是以空穴为主。Cu:Fe:LiNbO3晶体写入速度和灵敏度比Fe:LiNbO3晶体分别高60倍和67倍,动态范围比Fe:LiNbO3高15倍。讨论了近化学计量比Cu:Fe:LiNbO3晶体蓝光光折变效应增强机理。近化学计量比Cu:Fe:LiNbO3晶体表现出优良的蓝光光折变性能。Near-stoichiometric Cu：Fe：LiNbO3 crystals doped with 0.15%（in mass,the same below） CuO,0.03% and 0.05 %Fe2O3 were grown by top seeded solution growth method using K2O as a flux.The types of light-exciting carriers of Cu：Fe：LiNbO3 crystal were tested using Ar^＋ laser as light source at the 488 nm.The photorefractive holographic storage properties of the crystals were measured by two-wave coupling experiment,and were compared with those of Fe：LiNbO3 crystals tested using the 633 nm laser as light source.The results show that the holes are dominant in the light-exciting carriers of Cu：Fe：LiNbO3 crystal.Compared to the Fe：LiNbO3 crystal,the response speed,the sensitivity and dynamic range of Cu：Fe：LiNbO3 crystal are enhanced by 60,67 and 15 times,respectively.The mechanism of blue photorefractive enhancement is discussed.The near-stoichiometric Cu：Fe：LiNbO3 crystals have excellent blue photorefractive properties.

关 键 词：近化学计量比铌酸锂晶体 光折变性能 铜铁掺杂 顶部籽晶溶液生长法 

分 类 号：O734[理学—晶体学]