论文标题
来自两色激光等离子体相互作用的巨型孤立的Attsond脉冲
Giant isolated attosecond pulses from two-color laser plasma interactions
论文作者
论文摘要
确定了两种颜色（$ω$，$2Ω$）激光与纳米尺度箔的相互作用的新制度，即使在多循环激光器的情况下，也导致了极其强烈，孤立的attosecond脉冲的排放。对于超过爆破场强度的激光器照射的箔（即能够从离子背景中完全分离电子），添加第二个谐波场会导致箔片的稳定性至井喷强度。然后是急剧向透明度的急剧过渡，本质上是在单个光学周期内发生的。在过渡循环中，密集的纳米尺度电子束加速到相对论速度，并发出一个单一的，强的Attosend脉冲，峰强度接近激光场的峰值。
A new regime in the interaction of a two-colour ($ω$,$2ω$) laser with a nanometre-scale foil is identified, resulting in the emission of extremely intense, isolated attosecond pulses - even in the case of multi-cycle lasers. For foils irradiated by lasers exceeding the blow-out field strength (i.e. capable of fully separating electrons from the ion background), the addition of a second harmonic field results in the stabilization of the foil up to the blow-out intensity. This is then followed by a sharp transition to transparency that essentially occurs in a single optical cycle. During the transition cycle, a dense, nanometre-scale electron bunch is accelerated to relativistic velocities and emits a single, strong attosecond pulse with a peak intensity approaching that of the laser field.
