【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。更多还原

【Abstract】 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.更多还原