高浓度Er^(3+)掺杂Y_3Sc_2Ga_3O_(12)晶体的吸收光谱与晶体场模型研究  

Absorption spectra and crystal-field modeling of Er^(3+) doped in Y_3Sc_2Ga_3O_(12) crystal

作　　者：高进云[1] 孙敦陆[1] 罗建乔[1] 李秀丽[1] 刘文鹏[1] 张庆礼[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安徽省光子器件与材料重点实验室,合肥230031

出　　处：《物理学报》2014年第14期186-192,共7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高浓度掺铒(35 at%)钇钪镓石榴石(Er:YSGG)激光晶体.测试了该晶体在340—1700 nm波段内的吸收光谱,对其中Er3+的实验能级进行了分析指认.用Er:YSGG的102个实验Stark能级,拟合了它的自由离子参数和晶体场参数,均方根误差(拟合精度)σ为10.34 cm-1.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.将拟合得到的Er:YSGG实验结果与文献中已报道Er:YAG的自由离子参数和晶体场参数进行了比较.指出Er:YSGG具有较强的晶体场相互作用或许是其激光效率较高的主要原因之一.Er3＋-doped Y3Sc2Ga3O12（Er ： YSGG） single crystal is grown by Czochralski method successfully, and the absorption spectra are measured in a wider spectral wavelength range（340–1700 nm）. The experimental energy levels are analyzed and identified. The free-ion and crystal-field parameters are fitted by the experimental energy levels with a root mean square deviation of 10.34 cm-1, and 102 Stark energy levels of Er3＋in YSGG host crystals are assigned. It indicates that the fitting results of Stark energy levels are more satisfactory with the experimental spectra. Finally, the fitting results of free-ion and crystal-field parameters are compared with those already reported of Er ： YAG crystal. A conclusion is drawn that the Er ： YSGG has higher laser efficiency than Er ： YAG, which may result from Er ： YSGG that has a strong crystal field interaction.

关 键 词：ER3+ Y3Sc2Ga3O12晶体 吸收光谱 晶体场模型 能级拟合 

分 类 号：O734[理学—晶体学]