飞秒激光在石英玻璃中诱导微爆炸的理论研究

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.