Azoury Doron, Krüger Michael, Bruner Barry D, Smirnova Olga, Dudovich Nirit
Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, 76100, Israel.
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Sci Rep. 2021 Jan 12;11(1):495. doi: 10.1038/s41598-020-79805-x.
The Coulomb interaction between a photoelectron and its parent ion plays an important role in a large range of light-matter interactions. In this paper we obtain a direct insight into the Coulomb interaction and resolve, for the first time, the phase accumulated by the laser-driven electron as it interacts with the Coulomb potential. Applying extreme-ultraviolet interferometry enables us to resolve this phase with attosecond precision over a large energy range. Our findings identify a strong laser-Coulomb coupling, going beyond the standard recollision picture within the strong-field framework. Transformation of the results to the time domain reveals Coulomb-induced delays of the electrons along their trajectories, which vary by tens of attoseconds with the laser field intensity.
光电子与其母离子之间的库仑相互作用在大范围的光与物质相互作用中起着重要作用。在本文中，我们直接深入了解了库仑相互作用，并首次解析了激光驱动电子与库仑势相互作用时积累的相位。应用极紫外干涉测量法使我们能够在大能量范围内以阿秒精度解析这一相位。我们的研究结果确定了一种强激光 - 库仑耦合，超出了强场框架内的标准重碰撞图像。将结果转换到时域揭示了电子沿其轨迹的库仑诱导延迟，该延迟随激光场强度变化数十阿秒。
