Electro-optic shocks from ultraintense laser-plasma interactions
Electro-optic shocks from ultraintense laser-plasma interactions
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DOI：
10.1103/physrevlett.101.045004
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发表时间：
2008-07-25
影响因子：
8.6
通讯作者：
Ting, A.
中科院分区：
文献类型：
--
作者：
Gordon, D. F.;Hafizi, B.;Ting, A.
在等离子体中激光韦克菲尔德场的熄灭区产生电光激波形式的二次谐波辐射。冲击是由激光场与电子空泡区周围的电子鞘层相互作用产生的。由于鞘层很薄，相位匹配不重要，辐射能量随相互作用长度的增加而长期增长。发射角由切伦科夫角给出，切伦科夫角与二次谐波相速度与基波相速度之比相关。通过分析和粒子模拟，在三维冲击波的形成进行了研究。
Second harmonic radiation in the form of an electro-optic shock is produced in the blowout regime of a laser wakefield in a plasma. The shock is produced by the interaction between the laser field and the electron sheath surrounding the electron cavitation region. Because the sheath is thin, phase matching is unimportant, and the radiated energy grows secularly with the interaction length. The angle of emission is given by the Cherenkov angle associated with the ratio of the second harmonic phase velocity to the fundamental phase velocity. The shock formation is investigated in three dimensions via analysis and particle-in-cell simulations.