Nd^(3+)掺杂GdTaO_4的吸收光谱分析和晶场计算  

Absorption spectrum analysis and crystal-field calculation of Nd^(3+) doped in GdTaO_4 crystal

作　　者：高进云[1] 张庆礼[1] 王小飞[1] 刘文鹏[1] 孙贵华[1] 孙敦陆[1] 殷绍唐[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031

出　　处：《物理学报》2015年第12期229-234,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:51172236;91122021;51272254;61205173;50932005)资助的课题~~

摘　　要：采用提拉法生长出了钕掺杂钽酸钆重闪烁单斜激光晶体(Nd3+:Gd Ta O4).分别测试了该晶体a向、b向和c向的吸收光谱(波段为260—2000 nm),对其中Nd3+的实验能级进行了分析指认.确定了Nd3+:Gd Ta O4的102个实验Stark能级,拟合了其自由离子参数和晶体场参数,均方根误差(拟合精度)σ为12.66 cm-1.并将拟合得到的Nd3+:Gd Ta O4实验结果与文献中已报道的Nd3+:GdxLu1-xTa O4(x=0.85)的自由离子参数和晶体场参数进行了比较.结果表明,参数化Stark能级的拟合结果与实验光谱符合得较好.In this paper, Nd^3＋-doped GdTaO4 laser crystal for scintillator with high density is successfully grown by the Czochralski method, and the absorption spectra are measured along the a, b and c directions in a wide wavelength range of 260-2000 nm. The experimental energy levels for Nd^3＋are analyzed and identified. The free-ions and crystal-field parameters are fitted by the experimental energy levels with the root mean square deviation of 12.66 cm^-1, and 102 Stark energy levels for Nd3＋ in GdTaO4 host crystal are assigned. The fitting results of free-ions and crystal-field parameters are compared with those already reported for Nd^3＋：GdxLu1-xTaO4 （x=0.85） crystal. It indicates that the fitting results of Stark energy levels agree well with the experimental spectra.

关 键 词：ND^3+ GdTaO4晶体 吸收光谱 晶体场模型 能级拟合 

分 类 号：O433.4[机械工程—光学工程] O483[理学—光学]