Terahertz emission in tenuous gases irradiated by ultrashort laser pulses

作     者：王伟民 盛政明 武慧春 陈民 李春 张杰 K. Mima 

作者机构：Beijing National Laboratory of Condensed Matter Physics Institute of Physics CAS Department of Physics Shanghai Jiaotong University Max-Planck-Institut fr Quantenoptik Institut fr Theoretische Physik I Heinrich-Heine-Universitt Dsseldorf Institute of Laser Engineering Osaka University 2-6 Yamadaoka Suita 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2009年第33卷第S2期

页      面：142-145页

核心收录：

学科分类：0709[理学-地质学] 08[工学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by National Natural Science Foundation of China (10425416, 10674175, 60621063) National High-Tech ICF Com-mittee in China and National Basic Research Program of China (2007CB310406) 

主　　题：Terahertz emission ionization of gases plasma formation particle-in-cell simulations 

摘      要：Mechanism of terahertz (THz) pulse generation in gases irradiated by ultrashort laser pulses is investigated theoretically. Quasi-static transverse currents produced by laser field ionization of gases and the longitudinal modulation in formed plasmas are responsible for the THz emission at the electron plasma frequency, as demonstrated by particle-in-cell simulations including field ionization. The THz field amplitude scaling with the laser amplitude within a large range is also discussed.