论文标题
长波长驱动的非序列双电离中的脉冲长度效应
Pulse length effects in long wavelength driven non-sequential double ionization
论文作者
论文摘要
我们提出了由3100 nm激光源驱动的Argon中非序列双电离（NSDI）的联合实验和理论研究。相关的光电子动量分布（PMD）表明对脉冲持续时间有很强的依赖性，并且PMD的演变可以通过信封诱导的强度效应来解释。由隧道和拆卸之间的时间差确定，绑定电子的电离时间的激光矢量电势将受脉冲持续时间的影响，从而导致不同的漂移量。这种机制是通过经典的基于蒙特卡洛的模型提取的，可以通过量子机械模拟进一步确认。这项工作阐明了脉冲持续时间在NSDI中的重要性，并提高了我们对MID-IR激光场下强场隧道回收动力学的理解。
We present a joint experimental and theoretical study of non-sequential double ionization (NSDI) in argon driven by a 3100-nm laser source. The correlated photoelectron momentum distribution (PMD) shows a strong dependence on the pulse duration, and the evolution of the PMD can be explained by an envelope-induced intensity effect. Determined by the time difference between tunneling and rescattering, the laser vector potential at the ionization time of the bound electron will be influenced by the pulse duration, leading to different drift momenta. Such a mechanism is extracted through a classical trajectory Monte Carlo-based model and it can be further confirmed by quantum mechanical simulations. This work sheds light on the importance of the pulse duration in NSDI and improves our understanding of the strong field tunnel-recollision dynamics under mid-IR laser fields.
