掺Er^(3+)硅酸盐玻璃上转换发光特性研究  

Properties of Up-conversion Emission of Er^(3+)-doped Silicate Glasses

作　　者：李玮楠[1] 邹快盛[1] 陆敏[1] 相里斌[1] 

机构地区：[1]中国科学院西安光学精密机械研究所,瞬态光学与光子技术国家重点实验室,西安710068

出　　处：《无机材料学报》2007年第1期30-34,共5页Journal of Inorganic Materials

基　　金：陕西省自然科学基金(2003F18);中国科学院西安光机所所长基金(40401194)

摘　　要：研究了掺Er3+硅酸盐玻璃的吸收光谱和上转换光谱,应用Judd-Ofelt理论计算了Er3+强度参数Ωλ(λ=2、4、6)、跃迁振子强度、自发辐射几率、荧光分支比．上转换光谱分析表明:在522、545、658nm处有较强的绿光和红光,分别对应于3H11／2→4I15／2、4S3／2→4I15／2、4F9／2→4I15／2的跃迁,发光曲线拟合斜率分别为1．67,1．94,1．76;上转换发光机制主要是激发态吸收和能量转换,且均为双光子吸收过程．Absorption spectra and up-conversion emission spectra of Er^3＋-doped silicate glasses were investigated. The intensity parameters Ωλ（λ=2,4,6）, the oscillator strength, the spontaneous transition probabilities and the fluorescence branching ratios were calculated by the theory of Judd-Ofelt. The upconversion emission spectra show there are stronger green light and red light centered about 522nm, 545nm and 658nm, corresponding to the transition of 2H11/2 →^4I15/2, 4^S3/2 →^4I15/2, ^4F9/2 →^4I15/2, and the slope of fitted lines is 1.76, 1.94, 1.67, respectively, which indicates a two-photon process for the green and red light. The up-conversion mechanisms are determined to be excited state absorption and energy transfer.

关 键 词：激发态吸收 能量转换 上转换发光 双光子吸收 

分 类 号：TQ171[化学工程—玻璃工业]