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

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 π/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.

arXiv comment8 pages, 7 figures

References in corpus (5)

• Probing single-photon ionization on the attosecond time scale
• Attosecond-resolved photoionization of chiral molecules
• Photoelectron holographic interferometry to probe the longitudinal momentum offset at the tunnel exit
• Quantum dynamics of atomic Rydberg excitation in strong laser fields
• All-optical measurement of high-order fractional molecular echoes by high-order harmonic generation

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• Coulomb focusing in retrapped ionization with near-circularly polarized laser field
• Angular dependence of the Wigner time delay upon strong field ionization from an aligned p-orbital