Intermediate-state Coulomb-corrected strong-field approximation for rescattering processes
arXiv:2604.27386 · doi:10.15302/frontphys.2026.062204
Abstract
We analytically derive the all-order strong-field S-matrix series incorporating intermediate-state Coulomb-Volkov corrections (ICSFA). Focusing on rescattering processes described by the second-order term, we systematically investigate the impact of intermediate-state Coulomb interactions on above-threshold ionization (ATI) spectra of atomic hydrogen in linearly polarized laser fields. Crucially, ICSFA spectra demonstrate superior agreement with the results obtained by numerically solving the time-dependent Schrödinger equation compared to the standard strong-field approximation (SFA) and final-state Coulomb-corrected SFA (FCSFA). Our analysis reveals that intermediate-state Coulomb corrections enhance the yield of the third- and fourth-return-recollision trajectories while modifying interference patterns in the energy spectrum. The observed enhancement of the multi-return-recollision trajectories can be attributed to modifications of the ionization yield and scattering cross-section, which are induced by intermediate-state Coulomb effects. These effects are equivalent to the so-called Coulomb focusing effect.
13 pages, 8 figures
References in corpus (13)
- Low-Energy Structures in Strong Field Ionization Revealed by Quantum Orbits
- Imaging an aligned polyatomic molecule with laser-induced electron diffraction
- QPROP: A Schroedinger-solver for intense laser-atom interaction
- Symphony on Strong Field Approximation
- Strong Field Approximation for Systems with Coulomb Interaction
- High-order above-threshold ionization: the uniform approximation and the effect of the binding potential
- Origin of Unexpected Low Energy Structure in Photoelectron Spectra Induced by Mid-Infrared Strong Laser Fields
- Sub-barrier Coulomb effects on the interference pattern in tunneling ionization photoelectron spectra
- Influence of the Coulomb potential on above-threshold ionization: a quantum-orbit analysis beyond the strong-field approximation
- Probing Molecular Dynamics at Attosecond Resolution with Femtosecond Laser Pulses
- Influence of orbital symmetry on diffraction imaging with rescattering electron wave packets
- Strong-Field S-Matrix Theory With Coulomb-Volkov Final State in All Orders
- The effect of Coulomb field on laser-induced ultrafast imaging methods