Tb^(3+)离子掺杂CaF_(2)晶体的生长和发光性能  

Growth and Luminescence Properties of Tb^(3+) Ions Doped CaF_(2) Crystals

作　　者：刘坚 王无敌 宋青松 董建树 薛艳艳 王庆国[1] 徐晓东[2] 苏良碧[3] 徐军[1] LIU Jian;WANG Wu-di;SONG Qing-song;DONG Jian-shu;XUE Yan-yan;WANG Qing-guo;XU Xiao-dong;SU Liang-bi;XU Jun(School of Physics Science and Engineering,Institute for Advanced Study,Tongji University,Shanghai 200092,China;Jiangsu Key Laboratory of Advanced Laser Materials and Devices,School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China;State Key Laboratory of High-performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China)

机构地区：[1]同济大学物理科学与工程学院,高等研究院,上海200092 [2]江苏师范大学物理电子与工程学院,江苏省先进激光材料与器件重点实验室,江苏徐州221116 [3]中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海201899

出　　处：《发光学报》2022年第11期1750-1757,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61621001,62075166)资助项目。

摘　　要：使用温梯法生长了10%Tb,x%Y∶CaF_(2)(x=0,3,5,10)系列晶体。通过X射线衍射分析了晶体结构,结果表明高浓度的稀土离子掺杂使得晶胞参数增大,但是仍然保持CaF_(2)的萤石立方结构。采用吸收光谱、发射光谱及荧光衰减曲线等测试数据对其发光性能进行了研究。通过J‑O理论计算,共掺Y^(3+)离子后,光谱品质因子Ω_(4)/Ω_(6)由0.75增加到0.80。F‑L公式计算得到10%Tb∶CaF_(2)绿光545 nm处和黄光583 nm处的发射截面分别为0.89×10^(-21) cm^(2)和0.082×10^(-21) cm^(2),10%Tb,10%Y∶CaF_(2)在绿光545 nm处和黄光583 nm处的发射截面分别为0.89×10^(-21) cm^(2)和0.077×10^(-21) cm^(2)。并且Tb^(3+)离子^(5)D_(4)能级的荧光寿命都在5 ms以上,并不存在高浓度掺杂导致的荧光寿命降低现象,长荧光寿命意味着Tb^(3+)离子绝佳的储能能力。实验结果表明,Tb∶CaF_(2)及Tb,Y∶CaF_(2)晶体是有极大潜力实现可见激光输出的激光增益介质。A series of 10%Tb∶x%Y∶CaF_(2)(x=0,3,5,10)crystals have been successfully grown by the temperature gradient technique(TGT).The crystal structure was analyzed by X-ray diffraction,and the results showed that the high concentration of rare earth ion doping increased the unit cell parameters,but still maintained the fluorite cubic structure of CaF_(2).The absorption spectra,fluorescence spectra,and fluorescence decay curves were measured and analyzed at room temperature.By co-doping Y^(3+)ions,the spectral quality factorΩ_(4)/Ω_(6) increased from 0.75 to 0.80.Using FL formula,the emission cross sections of 10%Tb∶CaF_(2) were calculated to be 0.89×10^(-21) cm^(2) and 0.082×10^(-21) cm^(2) for the 545 nm and 587 nm,respectively,and the emission cross sections of 10%Tb,10%Y∶CaF_(2) were calculated to be 0.89×10^(-21) cm^(2) and 0.077×10^(-21) cm^(2) for the 545 nm and 587 nm.The fluorescence lifetime of ^(5)D_(4) level is more than 5 ms,and there is no fluorescence lifetime quenching phenomenon caused by high concentration doping.The long fluorescence lifetime means that Tb^(3+)ion has excellent energy storage capacity.The experimental results show that Tb∶CaF_(2) and Tb,Y∶CaF_(2) crystals are gain mediums with great potential to realize visible laser output.

关 键 词：Tb:CaF_(2) 可见激光 光谱性能 J-O理论 

分 类 号：O482.31[理学—固体物理]