Microscopic energy transport through photon-electron-phonon interactions during ultrashort laser ablation of wide bandgap materials Part Ⅰ: photon absorption  

作　　者：Lan Jiang Lishan Li Sumei Wang Hai-Lung Tsai 

机构地区：[1]Laser Micro-/Nano-Fabrication Laboratory, Department of Mechanical and Automation Engineering, 3^rd School, Beijing Institute of Technology, Beijig 100081, China [2]School of International Co-Education,Beijing Institute of Technology , Beijing 100081, China [3]Laser [4]Based Manufacturing Laboratory, Department of Mechanical and Aerospace Engineering, Missouri University of Science & Technology (formerly University of Missouri-Rolla ), Rolla, MO 65409, USA

出　　处：《中国激光》2009年第4期779-789,共11页Chinese Journal of Lasers

基　　金：supported by the National Natural Science Foundation of China(50705009);the 111 project China(B08043);the National“863”project of China(2008AA03Z301);the Changjiang Scholar Program of China;the Air Force Research Laboratory USA(FA8650-04-C-5704);the National Science Foundation USA(0423233)

摘　　要：The new phenomena induced by femtosecond lasers lead to the new area of ultrafast science.It is a significantchallenge to explain the phenomena associated with complex non-equilibrium and non-linear processes.Althoughthere is a growing body of experimental observation,a comprehensive model remains undeveloped.We reviewthe challenges in understanding the photon absorption stage mainly for the femtosecond ablation of wide bandgap materialsat the intensities of 10^(13)～10^(14) W/cm^2.Major opinions and challenges in ionization mechanisms are presentedby primarily considering multiphoton ionization and avalanche ionization.The new phenomena induced by femtosecond lasers lead to the new area of ultrafast science. It is a significant challenge to explain the phenomena associated with complex non-equilibrium and non-linear processes. Although there is a growing body of experimental observation, a comprehensive model remains undeveloped. We review the challenges in understanding the photon absorption stage mainly for the femtosecond ablation of wide bandgap materials at the intensities of 10^13- 10^14 W/cm^2. Major opinions and challenges in ionization mechanisms are presented by primarily considering multiphoton ionization and avalanche ionization.

关 键 词：激光导致 电离 光子 激光技术 

分 类 号：O562.4[理学—原子与分子物理] O572.31[理学—物理]