Tb^3＋掺杂SrO-TiO2-SiO2玻璃在红外飞秒激光照射下的三光子激发上转换发光  

Three-Photon-Excited Upconversion Luminescence of Tb^(3+)-Doped SrO-TiO_2-SiO_2 Glass by Infrared Femtosecond Laser Irradiation

作　　者：朱斌[1] 张松敏[1] 周时凤[1] 郁建灿[1] 曾伟[1] 邱建荣[1] 

机构地区：[1]浙江大学硅材料重点实验室,杭州310027

出　　处：《电子器件》2008年第1期65-67,71,共4页Chinese Journal of Electron Devices

基　　金：Supported by National Science Foundation of China(Grant No.50672087);National Basic Research Program of China(2006CB806000b);National High Technology Research and Development Program of China(G20060914)

摘　　要：Tb3+掺杂SrO-TiO2-SiO2玻璃在800nm的飞秒激光照射下可以观察到红外至可见的上转换现象。由飞秒激光激发的上转换荧光光谱与267nm氙灯激发的荧光光谱非常相似。其上转换荧光可归因于Tb3+的5D3→7F4和5D4→7FJ(J =6 ,5 ,4 ,3)能级跃迁。由发光强度和泵浦光源能量之间的关系可以得出此上转换过程为三光子同时吸收过程。基态电子同时吸收三个红外光子被激发到较高激发态,然后以非辐射跃迁方式弛豫到较低激发态,再辐射跃迁到基态从而产生Tb3+的特征发光峰。这现象可应用于三维立体显示,可见激光和高密度光存储技术。We report on near infrared to visible upconversion luminescence in Tb^3＋-doped SrO-TiO2-SiO2 glass excited at 800nm by using femtosecond laser irradiation. The luminescence spectra of the glass are similar for femtosecond laser irradiation and excitation at 267nm with a Xe lamp. The upconversion luminescence can be assigned to ^5D3→^7F4 and ^5D4→^7Fj （J=6, 5, 4, 3） transitions of Tb^3＋. The relationship between the emission intensity of Tb^3＋ and the pump power indicates that a three-photon simultaneous absorption process is dominant in the conversion of infrared to the green luminescence. We suggest that the simultaneous absorption of three infrared photons promotes the Tb^3＋ to excited states, which quickly cascade down to lower excited states, and radiatively relax to terminal states, resulting in the characteristic fluorescence of Tb^3＋. This has promising applications in three dimensional display, visible lasers and high-resolution optical data storage.

关 键 词：三维立体显示 多光子 荧光材料 玻璃与非晶态材料 

分 类 号：TN873.3[电子电信—信息与通信工程]