用正交双色激光场操纵氩原子非连续双电离过程中的电子动力学

IF 1.5 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Chinese Physics B Pub Date : 2024-05-01 DOI:10.1088/1674-1056/ad2606
Pengzhao Wang, Lijie Qian, Zhenrong Sun, Yan Yang
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引用次数: 0

摘要

非连续双电离(NSDI)过程中的电子动力学是激光-原子或激光-分子相互作用领域最具吸引力的研究领域之一。基于经典的二维模型,我们研究了氩原子在由 800 nm 和 400 nm 激光脉冲组成的几周期正交双色激光场驱动下的非连续双电离过程。通过改变两个激光脉冲的相对相位,在 0.5π 和 1.5π 处观察到 NSDI 产率的局部增强,这可能是由于在这些特定相位上,返回母离子的电子数量在极短的时间间隔内迅速大幅增加。通过分析 NSDI 事件不同时间窗内的电子-电子动量相关性以及不同通道中发射电子的角度分布,我们观察到再碰撞诱导电离(RII)通道中的电子-电子相关现象更为明显。这是因为 RII 通道的延迟时间较短。
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Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field
Electron dynamics during non-sequential double ionization (NSDI) is one of the most attractive areas of research in the field of laser–atom or laser–molecule interaction. Based on the classic two-dimensional model, we study the process of NSDI of argon atoms driven by a few-cycle orthogonal two-color laser field composed of 800 nm and 400 nm laser pulses. By changing the relative phase of the two laser pulses, a localized enhancement of NSDI yield is observed at 0.5π and 1.5π, which could be attributed to a rapid and substantial increase in the number of electrons returning to the parent ion within extremely short time intervals at these specific phases. Through the analysis of the electron–electron momentum correlations within different time windows of NSDI events and the angular distributions of emitted electrons in different channels, we observe a more pronounced electron–electron correlation phenomenon in the recollision-induced ionization (RII) channel. This is attributed to the shorter delay time in the RII channel.
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来源期刊
Chinese Physics B
Chinese Physics B 物理-物理:综合
CiteScore
2.80
自引率
23.50%
发文量
15667
审稿时长
2.4 months
期刊介绍: Chinese Physics B is an international journal covering the latest developments and achievements in all branches of physics worldwide (with the exception of nuclear physics and physics of elementary particles and fields, which is covered by Chinese Physics C). It publishes original research papers and rapid communications reflecting creative and innovative achievements across the field of physics, as well as review articles covering important accomplishments in the frontiers of physics. Subject coverage includes: Condensed matter physics and the physics of materials Atomic, molecular and optical physics Statistical, nonlinear and soft matter physics Plasma physics Interdisciplinary physics.
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