Coulomb-free and Coulomb-distorted recolliding quantum orbits in photoelectron holography

Abstract

We perform a detailed analysis of the different types of orbits in the\nCoulomb Quantum Orbit Strong-field Approximation (CQSFA), ranging from direct\nto those undergoing hard collisions. We show that some of them exhibit clear\ncounterparts in the standard formulations of the strong-field approximation for\ndirect and rescattered above-threshold ionization, and show that the standard\norbit classification commonly used in Coulomb-corrected models is\nover-simplified. We identify several types of rescattered orbits, such as those\nresponsible for the low-energy structures reported in the literature, and\ndetermine the momentum regions in which they occur. We also find formerly\noverlooked interference patterns caused by backscattered, Coulomb-corrected\norbits and assess their effect on photoelectron angular distributions. These\norbits improves the agreement of photoelectron angular distributions computed\nwith the CQSFA with the outcome of ab-initio methods for high-energy\nphtotoelectrons perpendicular to the field-polarization axis.\n