Studies on the mechanisms of powerful terahertz radiations from laser plasmas |
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| Authors: | Weimin Wang Zhengming Sheng Yutong Li Liming Chen Quanli Dong Xin Lu Jinglong Ma Jie Zhang Beijing National Laboratory of Condensed Matter Physics |
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| Institution: | Weimin Wang 1,Zhengming Sheng 1,2,Yutong Li 1,Liming Chen 1,Quanli Dong 1,Xin Lu 1,Jinglong Ma 1,and Jie Zhang 1,21 Beijing National Laboratory of Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China 2 Key Laboratory for Laser Plasmas (Ministry of Education),Department of Physics,Shanghai Jiao Tong University,Shanghai 200240,China |
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| Abstract: | A survey on the mechanisms of powerful terahertz (THz) radiation from laser plasmas is presented.Firstly,an analytical model is described,showing that a transverse net current formed in a plasma can be converted into THz radiations at the plasma oscillation frequency.This theory is applied to explain THz generation in a gas driven by two-color laser pulses.It is also applied to THz generation in a tenuous plasma driven by a chirped laser pulse,a few-cycle laser pulse,a DC/AC bias electric field.These are we... |
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