Nonlinear electrodynamics of the interaction of ultra-intense laser pulses with a thin foil
Nonlinear electrodynamics of the interaction of ultra-intense laser pulses with a thin foil
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DOI：
10.1063/1.872961
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发表时间：
1998-06
影响因子：
2.2
通讯作者：
V. Vshivkov;N. Naumova;F. Pegoraro;S. Bulanov
中科院分区：
文献类型：
--
作者：
V. Vshivkov;N. Naumova;F. Pegoraro;S. Bulanov
激光与箔（描述为高密度等离子体薄板）相互作用的分析描述以及细胞模拟中多维粒子的结果。箔处的匹配条件导致波动方程的非线性边界条件。给出了相对论透明的条件。与箔的相互作用导致激光脉冲成形。在相对论强脉冲倾斜入射的情况下，非线性耦合会改变脉冲偏振并导致高次谐波的发射和电流的产生。由于箔片表面的诱发变形，在法向和倾斜入射中观察到反射脉冲的强聚焦，特别是在三维模拟中。
An analytical description of the interaction of laser light with a foil, described as a thin slab of overdense plasma, is presented together with the results of multidimensional particle in cell simulations. The matching conditions at the foil result in nonlinear boundary conditions for the wave equation. The conditions for relativistic transparency are given. The interaction with the foil leads to shaping of the laser pulse. In the case of oblique incidence of a relativistically intense pulse, nonlinear coupling modifies the pulse polarization and causes emission of high harmonics and generation of an electric current. Strong focalization of the reflected pulse, in particular in three-dimensional simulations, is observed for normal and oblique incidence due to the induced distortion of the foil surface.