Simulation of High Power THz Emission from Laser Interaction with Tenuous Plasma and Gas Targets

作     者：Zheng-Ming Sheng Hui-Chun Wu Wei-MinWang Min Chen Xiao-Gang Dong Jun Zheng Jie Zhang 

作者机构：Department of PhysicsShanghai Jiao Tong UniversityShanghai 200240China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsCASBeijing 100190China Max-Planck-Institut f¨ur QuanenoptikD-85748 GarchingGermany 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2008年第4卷第10期

页      面：1258-1278页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：This workwas supported in part by theNationalNatural Science Foundation of China(Grants No.10425416,10335020,10674175,60621063) the National High-Tech ICF Committee in China,and the National Basic Research Program of China(Grant No.2007CB310406) 

主　　题：Particle-in-cell simulation laser-plasma electron plasma wave high power THz emission 

摘      要：With one-and two-dimensional particle-in-cell(PIC)codes,we simulate the generation of high power terahertz(THz)emission from the interaction of ultrashort intense lasers with tenuous plasma and gas *** driving high-amplitude electron plasma waves either with a laser wakefield or the beatwave of two laser pulses,powerful THz electromagnetic pulses can be produced by linear mode conversion in inhomogeneous plasma or by the transient current induced at the surfaces of a thin plasma layer of few plasma *** with incident lasers at moderate intensity such as 1017W/cm2,the produced emission can be at the level of tens of MW in power and capable of affording field strengths of a few MV/cm,suitable for the studies of THz nonlinear *** field ionization included in the PIC codes,THz emission from laser interaction with tenuous gas targets is *** is found that the transient transverse current formed during the ionization processes is responsible for the THz *** this mechanism,onemay also obtain THz fields ofMV/cm at lower laser intensity as compared with the schemes of plasma-wave excitation.