Coulomb Shifts in Spiderlike Photoelectron Momentum Distributions by Analytically-Coulomb- Corrected Semiclassical Rescattering Model

This paper presents numerical results on the spiderlike photoelectron momentum distributions (PMDs) induced by the ionization of hydrogen atoms by an intense laser pulse. In addition, although the standard semiclassical rescattering model ( SRM) has simplified actions of electrons, it fails to take complex Coulomb interaction into account. Different from existing numerical correction, this paper carries out an analytical approximate treatment of Coulomb interaction during the ionization, introduces it into SRM, and successfully constructs an analytically-Coulomb-corrected SRM ( AC-SRM). Based on AC-SRM, the systematic shifts of interference patterns caused by spiderlike PMDs and Coulomb interaction are simulated and calculated. Furthermore, through the classical phase, time-dependent Schrodinger equation (TDSE), electron orbit, and other methods, this paper quantitatively analyzes the shifts and explores the corresponding mechanism. The results show that the proposed classical phase method is the most sensitive to the Coulomb interaction in the spiderlike PMDs, especially to the first interference minima, and the accurate TDSE values verify the correctness of simulated results obtained by AC-SRM.