Nd∶YTaO_4的制备、结构与发光性能  

Preparation,Structure and Luminescence Properties of Nd∶YTaO_4

作　　者：丁守军 李秀丽 张庆礼 刘文鹏 赵义平 窦仁勤[1,2] 王小飞[1,2] 罗建乔 孙贵花 孙敦陆 

机构地区：[1]中国科学院安徽光学精密机械研究所光子器件与材料重点实验室,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《人工晶体学报》2016年第8期1987-1992,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51172236;51272254;61405206;51502292);中国科学院创新基金(CXJJ-15M055);中国科学院功能晶体与激光技术重点实验室开放课题资助项目(FCLT201405)

摘　　要：为探索新型激光材料,采用高温固相反应法合成了(1at%)Nd∶YTaO_4多晶粉末,研究了其结构与发光性质。利用Rietveld方法对样品的X射线衍射谱进行精修得到晶胞参数、原子坐标等。测试了样品8 K温度下的激发光谱以及8 K和室温下808 nm激发的荧光光谱,对发光谱峰进行了指认,获得了Nd^(3+)在YTaO_4中的晶场能级分裂。结果表明,Nd^(3+)的~4F_(3/2)→~4I_(11/2)跃迁的发射截面为28.4×10^(-20)cm^2,荧光寿命为155μs。较小的发射截面和较长的能级寿命表明Nd∶YTaO_4是一种很有希望的激光二极管抽运的调Q激光材料。In order to obtain new laser material, （ 1at% ） Nd^3＋ ： YTaO4 polycrystalline powder was synthesized by high temperature solid-state reaction method, the structure and luminescence properties were studied. Its lattice parameters, atomic parameters and so on were obtained by Rietvield refinement to X-ray diffraction. The excitation spectrum at 8 K and emission spectra （under 808 nm excitation） at 8 K and room temperature of Nd^3＋ ： YTaO4 were measured. Photoluminescence peaks were assigned, and the crystal-field energy split of Nd^3 ＋ in YTaO4 was obtained. The emission cross section of the transition 4F 3 / 2 →^4I11/ 2was calculated to be 28.4 × 10^（-20） cm^2 , and the fluorescence lifetime of ^4F3/2 level was fitted to be 155 μs. The small emission cross section and relative long lifetime indicates that Nd- YTaO4 is a promising Q-switch laser material pumped by laser diode.

关 键 词：Nd∶YTaO4 发光 Rietvield法 能级分裂 

分 类 号：O78[理学—晶体学]