Optical Review ( IF 1.1 ) Pub Date : 2024-04-04 , DOI: 10.1007/s10043-024-00880-w Bing Liu , Wei-Wei Yu
In this paper, we employ the quantum trajectory Monte Carlo model to simulate the momentum distribution of Argon atoms during tunneling ionization. Our analysis illustrates the use of semi-classical models to study the changes in electron trajectories under different laser field intensities. And by studying the different subcycles, the changes of the interference pattern are observed. Our approach successfully observes the interference patterns resembling fishbone and spider stripes. We delve into the subperiodic interference structures present in the photoelectron momentum distributions. Specifically, we investigate the correlation effects of ionization trajectories on the interference fringes within the same period and in adjacent periods. Our analysis demonstrates that the holographic interference fringe results from the superposition of direct ionization trajectories and scattering trajectories. We elucidate the mechanisms underlying the formation of above-threshold ionization (ATI) ring structures and temporal double-slit interference patterns. Additionally, we investigate how wave packets perceive the Coulomb potential and its impact on interference phenomena under varying field intensities. Notably, without the Coulomb potential, the original spider-like holographic interference pattern disappears, replaced by temporal double-slit interference fringes similar to those observed within a comparable time frame.
中文翻译:
线偏振激光场中不同场强干涉结构研究
在本文中,我们采用量子轨迹蒙特卡罗模型来模拟隧道电离过程中氩原子的动量分布。我们的分析说明了使用半经典模型来研究不同激光场强度下电子轨迹的变化。并通过研究不同的子周期,观察到干涉图样的变化。我们的方法成功地观察到类似鱼骨和蜘蛛条纹的干涉图案。我们深入研究光电子动量分布中存在的亚周期干涉结构。具体来说,我们研究了同一周期和相邻周期内电离轨迹对干涉条纹的相关效应。我们的分析表明,全息干涉条纹是直接电离轨迹和散射轨迹叠加的结果。我们阐明了阈值以上电离(ATI)环结构和时间双缝干涉图案形成的机制。此外,我们还研究了波包如何感知库仑势及其在不同场强下对干涉现象的影响。值得注意的是,如果没有库仑势,原始的蜘蛛状全息干涉图案就会消失,取而代之的是与在可比时间范围内观察到的类似的时间双缝干涉条纹。