论文标题
通过电离引起的时空重塑对强烈脉冲的自我焦点和自我压缩
Self-focusing and self-compression of intense pulses via ionization-induced spatiotemporal reshaping
论文作者
论文摘要
电离是强烈激光相互作用的一个基本过程，已知会导致血浆散热和强度夹紧。在这里，我们从理论上研究了电离饱和度方案中氦气射流中强激光脉冲的传播动力学，我们发现该脉冲通过电离引起的重塑经历了自我关注和自我压缩，从而导致激光强度的大量增加。这种非常规的行为与电离和空中原则偶联介导的时空频率变化有关。我们的结果说明了一种新的脉冲传播状态，并为提高激光强度的无光学方法打开了。
Ionization is a fundamental process in intense laser-matter interactions, and is known to cause plasma defocusing and intensity clamping. Here, we investigate theoretically the propagation dynamics of an intense laser pulse in a helium gas jet in the ionization saturation regime, and we find that the pulse undergoes self-focusing and self-compression through ionization-induced reshaping, resulting in a manyfold increase in the laser intensity. This unconventional behavior is associated with the spatiotemporal frequency variation mediated by ionization and spatiotempral coupling. Our results illustrate a new regime of pulse propagation and open up an optics-less approach for raising the laser intensity.
