物理学报2011，Vol.60Issue(6)：718-725,8.
超短脉冲激光在电介质材料中传输及破坏深度微观理论计算
Microscopic theoretical investigation on propagation and breakdown depth of ultrashort-pulse laser in dielectrics
摘要
Abstract
Based on the Fokker-Planck equation along with laser propagation equation, a theoretical model that describes the ultrashort-pulse laser propagation characteristics and breakdown in dielectrics is established. Using this model, the conduction band electron densities and the electric field intensities at different positions in a dielectric material at different time are calculated. The variations of reflection, transmittance and energy deposition rate with input laser energy density are discussed. With the threshold conduction band electron density criterion, the breakdown depth in the material under varying laser energy density is calculated, which is found to increase first with laser energy density, and then to decline after reaching a maximum value. Effect of the spatial distribution of laser energy deposition on breakdown depth is analyzed. Meanwhile, the maximum value of breakdown depth is found to decrease as the laser pulse duration becomes shorter.关键词
超短脉冲激光/电介质材料/破坏深度/微观理论模型Key words
ultrashort-pulse laser/ dielectric/ breakdown depth/ microscopic theoretical model引用本文复制引用
李东海,陈发良..超短脉冲激光在电介质材料中传输及破坏深度微观理论计算[J].物理学报,2011,60(6):718-725,8.基金项目
国家高技术研究发展计划资助的课题. （）
