飞秒激光在石英玻璃中诱导微爆炸的理论研究  

Theoretical analysis of fs-laser induced micro-explosion in fused silica

作　　者：徐世珍[1] 贾天卿[1] 孙海轶[1] 李晓溪[1] 程兆谷[1] 冯东海[1] 李成斌[1] 徐至展[1] 

机构地区：[1]中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800

出　　处：《物理学报》2005年第9期4146-4150,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:G60108002)资助的课题.~~

摘　　要：利用有限元方法建立了二维模型,研究了飞秒激光作用下石英玻璃中导带电子的产生、激光能量的沉积、导带电子和能量扩散等微观过程.计算了导带电子扩散引起的局部净电荷及其形成的静电场分布,初步揭示了微爆炸的演化过程.Based on the avalanche model, the evolution of femtosecond laser induced micro-explosion in fused silica was investigated. The microscopic processes, including the production of conduction band electron （ CBE）, laser energy deposition, CBE and energy diffusion were solved by a finite element method in two-dimensional cylindrical coordinates. The accumulated net charge and the electrostatic field were also calculated. The results indicate that the CBE and energy diffusions play an important role in the micro-explosion in dielectrics.

关 键 词：雪崩击穿模型 微爆炸 有限元方法 石英玻璃 飞秒激光 理论研究 诱导 导带电子 静电场分布 二维模型 

分 类 号：TN241[电子电信—物理电子学]