近红外飞秒激光在纯石英玻璃中诱导产生色心  

NEAR-INFRARED FEMTOSECOND LASER INDUCED COLOR CENTERS IN HIGH-PURITY FUSED SILICA

作　　者：周秦岭[1] 刘丽英[2] 徐雷[2] 王文澄[2] 邱建荣[1] 朱从善[1] 干福熹[1] 

机构地区：[1]中国科学院上海光学精密机械研究所光子技术实验室,上海201800 [2]复旦大学光科学与工程系

出　　处：《红外与毫米波学报》2004年第5期360-362,366,共4页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金资助项目 ( 10 0 740 11);国家基础研究重大项目前期研究专项资助项目 ( 2 0 0 1CCA0 460 0 )

摘　　要：聚焦的近红外飞秒激光在纯石英玻璃中诱导产生SiE′心 .在宏观破坏前 ,色心含量随激光功率密度、辐照脉冲数呈线性关系增长 .通过飞秒激光辐照前后石英玻璃的吸收光谱、电子自旋共振谱、荧光谱分析 ,提出了超短脉冲激光作用下SiE′心的形成过程 ,并认为激子自陷是色心形成的主要原因 .Si E' centers were induced in high-purity silica glass after infrared fs(femtosecond) laser exposure. The concentration of the color centers increased linearly with the laser intensity and the number of scan time below the optical breakdown threshold. From the results of absorption, ESR and photo-luminescence spectra measurements before and after fs laser irradiation, the processes of Si E' center formation were proposed. The self-trapped excitons are ascribed to the main reason of color centers formation.

关 键 词：色心 飞秒激光 激子 吸收光谱 荧光谱 电子自旋共振 石英玻璃 近红外 激光功率 自陷 

分 类 号：TN248[电子电信—物理电子学] O773[理学—晶体学]