论文标题
通过亚周期激光脉冲和相关缩放定律高阶谐波生成
High-order harmonic generation by sub-cycle laser pulses and associated scaling laws
论文作者
论文摘要
我们通过亚周期激光脉冲与He原子的相互作用研究了高谐波产生。使用复杂的源矢量梁模型对亚周期脉冲进行建模，该模型是麦克斯韦方程的精确解决方案，并准确地建模了子周期场曲线。我们观察到可以随着亚周期脉冲持续时间的变化而扩展谐波截止，这主要是因为与较短的脉冲相关的固有蓝光。还推导了谐波产量和谐波截止能量的缩放定律，并推导脉冲持续时间和基本驱动器波长。此外，进行了亚周期脉冲的谐波产生的详细小波分析。谐波的适当滤波和叠加导致持续时间〜100的单一脉冲。
We studied the high-harmonic generation by the interaction of sub-cycle laser pulses with the He atom. The sub-cycle pulses are modeled using the complex source vector beam model, which is an exact solution to Maxwell's equations and accurately models the sub-cycle field profiles. We observed that the harmonic cutoff could be extended with the variation of the sub-cycle pulse duration, mainly because of the inherent blueshift associated with shorter pulses. The scaling laws for the harmonic yield and harmonic cutoff energy with pulse duration and fundamental driver wavelengths are also deduced. Furthermore, a detailed wavelet analysis of harmonic generation by sub-cycle pulses is carried out. The appropriate filtering and superposition of the harmonics gave rise to a single attosecond pulse of duration ~ 100 as.
