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arXiv · 1911.04035

Semiclassical analysis of photoelectron interference in a synthesized two-color laser pulse

Yudi Feng·Min Li·Siqiang Luo·Kun Liu·Baojie Du·Yueming Zhou·Peixiang Lu
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Abstract

We measure the photoelectron energy spectra from strong-field ionization of Kr in a two-color laser pulse consisting of a strong 400-nm field and a weak 800-nm field. The intensities of the main above-threshold ionization (ATI) and sideband peaks in the photoelectron energy spectra oscillate roughly oppositely with respect to the relative phase between the two-color components. We study the photoelectron interferometry in strong-field ATI regime from the view of interference of different electron trajectories in order to extend RABBITT type analysis to the strong-field regime. Based on the strong-field approximation model, we obtain analytical expressions for the oscillations of both ATI and sideband peaks with the relative phase. A phase shift of \pi/4 with respect to the field maximum of the two-color laser pulse is revealed for the interference maximum in the main ATI peak without including the effect of the atomic potential.

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Yudi Feng, Min Li, Siqiang Luo, Kun Liu, Baojie Du, Yueming Zhou, Peixiang Lu. 2019-11-11. Semiclassical analysis of photoelectron interference in a synthesized two-color laser pulse. https://doi.org/10.1103/physreva.100.063411

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