Studies on the mechanisms of powerful terahertz radiations from laser plasmas

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（10）
• 页码范围: 1-7
• 页数: 7页
• 语种: 英文
• DOI: 10.3788/COL201109.110002

摘要

1.IntroductionTerahertz (THz) waves with the field strength up to MV/cm or beyond are demanded for broad applications,such as nonlinear THz spectroscopy,THz nonlinear physics in condensed matters and semiconductors,nonperturbative THz electro-optics,etc.[1,2].Such THz waves are usually obtained from accelerator-based sources,which are still limited by the bandwidth,waveform,and the availability to most users.Therefore,table-top powerful THz sources[3-9] based on laserplasma interactions or laser-gas interactions have been attracting significant attention recently.For example,strong THz radiations can be prodeced from the laser wakefield in inhomogeneous plasmas by linear mode conversion[4] or from the transition radiation at plasmavacuum boundaries using ultrashort electron bunches produced from laser wakefield acceleration[8].