Pr^(3+):Y_2SiO_5中的反斯托克斯荧光谱及其对基态Stark分裂能级的确定  

Anti-Stokes Blue Fluorescence and Stark Splitting of ~3H_4 in Pr^(3+):Y_2SiO_5(YSO)

作　　者：张衍亮[1] 孙真荣[1] 李玉琼[1] 丁良恩[1] 王祖赓[1] 

机构地区：[1]光谱学与波谱学教育部重点实验室,华东师范大学物理系,上海200062

出　　处：《光谱学与光谱分析》2004年第4期385-387,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (1 0 0 740 1 5);上海市重点学科基金资助

摘　　要：掺杂在晶体Y2 SiO5(YSO)中的Pr3+ ,运用脉冲激光激发 3H4 → 1 D2 跃迁 ,粒子通过非辐射能量转移从能级 1 D2 转移到能级 3P0 ,测得了对应于 3P0 → 3H4 跃迁的反斯托克斯荧光光谱 ,由此可确定 3H4 的Stark分裂能级以及 3P0 能级的能量高度。与运用激光激发 3H4 → 1 D2 跃迁 ,通过观察 1 D2 → 3H4 斯托克斯荧光光谱确定3H4 的Stark分裂能级方法相比 ,该过程避免了不同晶点位置中 (Crystallographicsite)Pr3+ 的 1 D2 能级间的能量转移影响 ,从而具有较高的确定性。同时 。In the Pr 3+-doped Y 2SiO 5, the population in 1D 2 of Pr 3+ can be transferred to 3P 0 state via non-radiative energy transfer by the laser excitation in resonance with 3H 4→ 1D 2, and we can experimentally study the Stark splitting of 3H 4 energy level via 3P 0→ 3H 4 anti-Stokes emission spectra. Because the anti-Stokes emission spectra can avoid the energy transfer between different crystallographic site 1D 2 energy levels, the above splitting lines attribution is more accurate than the assignment via 1D 2→ 3H 4 Stokes spectra by the laser excitation in resonance with 3H 4→ 1D 2. In addition, the character of the anti-Stokes fluorescence decay time was observed.

关 键 词：反斯托克斯荧光谱 能量转移 Stark分裂 能级 脉冲激光技术 Pr^3+:Y2SiO5 激光材料 

分 类 号：TN244[电子电信—物理电子学] O433.54[机械工程—光学工程]