掺Er^(3+)的新型GeS_2-In_2S_3-CsI玻璃双光子吸收绿光上转换发光研究  

Two-photon Excited Green Upconversion Luminescence of Er^(3+)-doped Novel GeS_2-In_2S_3-CsI Glass

作　　者：邓圣伟[1] 徐铁峰[1] 戴世勋[1,2] 聂秋华[1] 王训四[1] 沈祥[1] 章向华[3,1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]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710119 [3]法国雷恩大学玻璃与陶瓷国家实验室,雷恩35042

出　　处：《半导体光电》2010年第3期397-401,共5页Semiconductor Optoelectronics

基　　金：国家自然基金项目(60878042);中国博士后基金项目(20080430204);浙江省自然基金项目(Y407253)

摘　　要：用熔融急冷法制备了掺Er3+的80GeS2-10In2S3-10CsI(mol%)硫卤玻璃样品,研究了该样品的吸收光谱和上转换光谱,分析了Er3+离子在该玻璃中的上转换发光机理。应用Judd-Ofelt理论计算分析了Er3+离子在该样品中的强度参数Ωt(t=2,4,6)、自发辐射跃迁几率A、荧光分支比β等光谱参数。在980nmLD泵浦激发下,首次在该种玻璃中观察到强烈的绿光(527nm、548nm),分别对应于4H11/2→4I15/2和4S3/2→4I15/2的跃迁,且548nm绿光强度大于527nm绿光强度。同时研究了绿光(527nm、548nm)上转换发光强度随泵浦激发功率的变化,其发光曲线拟合斜率分别为1.90和2.06,表明绿光是双光子吸收过程。研究结果表明:掺Er3+含铟(In)硫系玻璃有望应用于可见光激光器、高密度光储存、三维色彩显示等领域。A sample of Er3＋-doped 80GeS2-10In2S3-10CsI（mol%）chalcohalide glass was fabricated by the melt-quench method. Absorption spectra and upconversion emission spectra of the glass were investigated,and upconversion mechanisms of Er3＋in the glass were analyzed. The intensity parameters Ωt（t=2,4,6）,the oscillator strengths,the spontaneous transition probabilities and fluorescence branching ratios were calculated by the theory of Judd-Ofelt. Under 980 nm diode laser excitation,Intense green emissions centered at 527 nm and 548 nm,corresponding to the transitions of H11/2→4I15/2 and 4S3/2→4I15/2,respectively,were observed for the first time in this glass. The upconversion emission intensity varies with the power of infared excitation intensity. A plot of logI vs logP yields two fitted lines with slope 1.90 and 2.06,respectively,which indicates a two-photon process for the green emission. The results suggest the In-based chalcohalide glass containing Er3＋ ions is expected to find applications in visible lasers,high density optical storage and three-dimensional color displays.

关 键 词：硫卤玻璃 上转换发光 绿光 Er3+离子 

分 类 号：TQ171.1[化学工程—玻璃工业]