摘要
掺入摩尔分数为1%MgO,0.5%Sc2O3和质量分数为0.03%Fe2O3,从 Li与Nb 摩尔比分别为0.85,0.94,1.05,1.20和1.38的熔体中用提拉法生长Mg:Sc:Fe:LiNbO3(Mg:Sc:Fe:LN)晶体。测试了晶体的紫外–可见吸收光谱和红外光谱、抗光损伤能力、衍射效率、响应时间和光折变灵敏度。结果表明:随着Li/Nb摩尔比增加,Mg:Sc:Fe:LN 晶体的吸收边发生紫移;n(Li)/n(Nb)=1.05 的晶体分别在3466,3481cm–1和3504 cm–1处出现 OH–吸收峰;n(Li)/n(Nb)=1.38 的晶体在3504cm–1和 3535 cm–1处出现OH–吸收峰。随n(Li)/n(Nb)的增加,Mg:Sc:Fe:LN 晶体的衍射效率减小,响应速度和光折变灵敏度增大。n(Li)/n(Nb)=1.05 的近化学计量比 Mg:Sc:Fe:LN 晶体的抗光损伤能力最高。
A series of Mg：Sc：Fe：LiNbO3 （Mg：Sc：Fe：LN） crystals doped with 1% （in mole, the same below） MgO and 0.5% Sc2O3 and with 0.03% （in mass） Fe2O3 were grown by Czochralski method from the melt with various mole ratios of Li to Nb （0.85, 0.94, 1.05, 1.20 and 1.38）. The infrared spectrum and ultraviolet-visible absorption spectrum, the photo-damage resistance, the diffi＇action efficiency, the response speed and photorefractive sensitivity of Mg：Sc：Fe：LN crystals were measured. The results show that with the Li/Nb mole ratios increasing, the absorption edge the Mg：Sc：Fe：LN crystals shifts to the violet. The OH^- absorption peak of the crystal with a Li/Nb mole ratio of 1.05 are located at 3 466, 3 481 and 3 504 cm^-1, respectively, and the OH^- absorption peak of the crystal with a Li/Nb mole ratio of 1.38 are located at 3 504 and 3 535 cm^-1. And that with the increase of Li/Nb mole ratios, the diffraction efficiency decreases, response speed and photoret^active sensitivity increases of the Mg：Sc：Fe：LN crystals. The photo-damage resistance ability of the.near-stoichiometric Mg：Sc：Fe：LN crystal with a Li to Nb mole ratio of 1.05 is the highest.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第8期1088-1092,共5页
Journal of The Chinese Ceramic Society
基金
黑龙江省自然科学基金(E200512)资助项目
关键词
镁钪铁掺杂铌酸锂晶体
提拉法
光折变性能
红外光谱
magnesium, scandium and iron codoped lithium niobate crystal
Czochralski method
photoret
active property
infrared spectrum
