近日，华中科技大学陆培祥团队报道了XUV辅助光电离中光电子干扰的控制。相关论文于2025年11月18日发表在《物理评论A》杂志上。

强场光电子干涉测量是探测原子分子结构与超快电子动力学的重要工具。光电子动量谱中通常交织着不同类型的干涉图样，这为提取特定干涉信息带来困难。因此，增强目标干涉特征对其应用至关重要。

研究组提出通过紫外激光辅助光电离来实现光电子动量谱干涉调控的新方案。该方案利用XUV脉冲控制初始电离/激发过程，再通过红外场操控后续电子动力学，从而为调控光电子干涉提供更多自由度。通过数值求解三维含时薛定谔方程，研究组发现通过调节XUV-IR脉冲延时和XUV脉冲参数，可选择性增强或抑制周期间干涉与近前向再散射光电子全息干涉。该研究为通过光电子干涉实现阿秒时间尺度的电子运动追踪开辟了新途径。

附：英文原文

Title: Control of the photoelectron interference in XUV-assisted photoionization

Author: Liding Li, Yongkun Chen, Jiawang Guo, Jia Tan, Yueming Zhou, Peixiang Lu

Issue&Volume: 2025/11/18

Abstract: Photoelectron interferometry in strong-field photoionization serves as a powerful tool for probing atomic and molecular structure, and ultrafast electron dynamics. In the photoelectron momentum spectrum, different types of interference patterns are intertwined, which complicates the extraction of information from specific interference patterns. Enhancing the desired interference features is thus essential for their applications. Here, we propose a scheme to control the interference in the photoelectron momentum spectrum through ultraviolet (XUV)-assisted photoionization. Our scheme employs an XUV pulse to govern the initial ionization or excitation process, and an infrared (IR) field to steer the subsequent electron dynamics, offering more degrees of freedom to tailor photoelectron interference. By numerically solving the three-dimensional time-dependent Schrdinger equation, we demonstrate that the intracycle interference and the near-forward rescattering photoelectron holographic interference are selectively enhanced or suppressed by tuning the XUV-IR time delay and the XUV pulse parameters. Our findings pave the way for attosecond-scale tracking of electron motion via photoelectron interferometry.

DOI: 10.1103/dplc-wb95

Source: https://journals.aps.org/pra/abstract/10.1103/dplc-wb95