Direct measurement of Coulomb-laser coupling

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Date
2021
Volume
11
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[London] : Macmillan Publishers Limited, part of Springer Nature
Abstract

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.

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Azoury, D., Krüger, M., Bruner, B. D., Smirnova, O., & Dudovich, N. (2021). Direct measurement of Coulomb-laser coupling. 11. https://doi.org//10.1038/s41598-020-79805-x
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CC BY 4.0 Unported