Transient surface electromagnetic fields triggered by a super-short laser pulse through ultrafast generation of a charge-separation field at a high-conductivity target have been studied. Both the analytic theory applicable to the near-field problem and the finite-difference time-domain simulations clearly manifest distinctive features of the proposed mechanism, which is associated with fast electric polarization of a high-conductivity target by rapidly switching on a charge-separation field when an ultrashort laser pulse quickly pushes the target electrons out to a vacuum. This mechanism is well suited for the current trend in creating lasers with a record short pulse duration for laser–plasma interactions.

中文翻译：

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激光触发的快速电荷分离场产生强大的表面电流和波

研究了超短激光脉冲通过在高电导率目标上超快速产生电荷分离场而触发的瞬态表面电磁场。适用于近场问题的分析理论和时域有限差分模拟都清楚地表明了所提出机制的显着特征，该机制与通过快速接通电荷分离来实现高电导靶的快速极化有关超短激光脉冲迅速将目标电子推到真空中时产生磁场。这种机制非常适合当前的趋势，即创建具有创纪录的短脉冲持续时间以进行激光与等离子体相互作用的激光器。