Er^(3+),Tm^(3+)共掺的NaY(WO_4)_2晶体的光谱分析和上转换发光  

Upconversion luminescence and Spectra characteristics of Er^(3+), Tm^(3+) co-doped NaY(WO_4)_2 crystal

作　　者：谭浩[1] 宋峰[1] 苏静[1] 商美茹[1] 付博[1] 张光寅[1] 程振祥[2] 陈焕矗[2] 

机构地区：[1]南开大学光子学中心,天津300071 [2]山东大学晶体研究所,济南250100

出　　处：《物理学报》2004年第2期631-635,共5页Acta Physica Sinica

基　　金：教育部重点基金 (批准号 :0 10 47);国家自然科学基金 (批准号 :60 3 770 3 3 ;60 0 2 5 5 12 )资助的课题~~

摘　　要：在室温下 ,测量了Er:Tm :NaY(WO4 ) 2 晶体的吸收光谱、激发光谱、发射光谱以及上转换发光 ,并运用J O理论对测量的结果进行了计算 ,得出了Er:Tm :NaY(WO4 ) 2 晶体的强度参数 .报道了Tm ,Er离子间特殊的能量传递和相关上转换 ,解释了离子间的能级跃迁过程 .同时 。Absorption spectra, emission spectra, excitation spectra, and upconversion luminescence of Er 3+, Tm 3+ co-doped NaY(WO 4) 2 crystal were measured at room temperature. Intensity parameters are calculated from absorption spectra in terms of Judd-Offelt theory. Transition processes of the energy levels of Er 3+ and Tm 3+ were analyzed in details and the cross relaxations: 1G 4(Tm 3+)+ 4I 15/2(Er 3+)→ 3F 4(Tm 3+) + 4F 9/2(Er 3+) , 1G 4(Tm 3+)+ 4I 15/2(Er 3+)→ 3H 5(Tm 3+)+ 4I 9/2(Er 3+), 3F 4(Tm 3+)+ 4I 9/2(Er 3+)→ 3H 6(Tm 3+)+ 4S 3/2 or 2H 11/2(Er 3+) and 4F 9/2(Er 3+)+ 3H 6(Tm 3+)→ 4I 15/2(Er 3+)+ 3F 3(Tm 3+) were put forward. Sufficient proofs have been found to illustrate the use of Er 3+ as a sensitizer which is effective for the Tm 3+-doped crystal.

关 键 词：铒离子掺杂 铥离子掺杂 钨酸钇钠晶体 吸收光谱 发射光谱 激发光谱 上转换 

分 类 号：O734[理学—晶体学]