%0 Journal Article
%T Simulation Study of Thermal and Mechanical Effect on Metal Film Irradiated by Ultra-fast Laser Pulse<br>超快脉冲激光辐照金属薄膜热-力效应的模拟研究
%A WANG De-fei
%A QI Wen-zong
%A GUO Chun-feng
%A <br>王德飞
%A 齐文宗
%A 郭春凤
%J 光子学报
%D 2008
%I 
%X Based on the dual-temperature hyperbolic two-step heat conduction and hot- electron blast models,a new set of fully coupled and nonlinear ultra-fast thermo-elasticity model was derived to investigate the thermo-mechanical coupling effect of metal films caused by ultra-fast pulsed laser.Taking the 200nm gold film irradiated by a 100fs laser pulse as a typical example,thermal stress development in the lattice sub-system,temperature along with temperature gradient and electron heat flux were modeled by using artificial viscosity and the adaptive step finite-difference algorithm.It is shown that the early period of laser heating is a non-equilibrium process and forming large hot-electron blast force.It is also found that electron heat flow presents bimodal phenomenon.In addition,thermal stress induced by ultra-fast laser heating could be the main reason for mechanical damage.
%K Ultra-fast pulse Laser
%K Metal films
%K Ultra-fast thermo-elasticity
%K Thermal stress
%K Non-thermal equilibrium<br>超快脉冲激光
%K 金属薄膜
%K 超快热弹
%K 热应力
%K 非热平衡
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=894543FC652578BF3EB000DBACB0868E&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=708DD6B15D2464E8&sid=CAA85A92D7D80185&eid=0655FC50739A12C2&journal_id=1004-4213&journal_name=光子学报&referenced_num=3&reference_num=18