Coulomb Rescattering in Nondipole Interaction of Atoms with Intense Laser Fields

Abstract

We investigate the ionization dynamics of atoms irradiated by an intense laser field using a semiclassical model that includes magnetic Lorentz force in the rescattering process. We find that, the electrons tunneled with different initial transverse momenta (i.e., perpendicular to the instantaneous electric field direction) distributed on a specific circle in the momentum plane can finally converge to the same transverse momentum after experiencing Coulomb forward scattering. These electron trajectories lead to a bright spot structure in the 2D transverse momentum distribution, and particularly in the long-wavelength limit, a nonzero momentum peak in the direction antiparallel to the laser propagation (or radiation pressure) direction. Making analysis of the subcycle dynamics of rescattering trajectories, we unveil the underlying mechanism of the anti-intuitive peak. Beyond the strong field approximation and the dipole approximation, we quantitatively predict the spot center and the peak position. Our results are compared with a recent experiment and some theoretical predictions are given.

arXiv comment5 pages, 4 figures

References in corpus (8)

• Breakdown of the Dipole Approximation in Strong-Field Ionization
• Partitioning of the linear photon momentum in multiphoton ionization
• Intracycle and Intercycle Interferences in Above-Threshold Ionization: the Time Grating
• Origin of Unexpected Low Energy Structure in Photoelectron Spectra Induced by Mid-Infrared Strong Laser Fields
• Electron-energy bunching in laser-driven soft recollisions
• Under-the-barrier dynamics in laser-induced relativistic tunneling
• Formation of very low energy states crossing the ionization threshold of argon atoms in strong mid-infrared fields
• Slalom in complex time: emergence of low-energy structures in tunnel ionization via complex time contours

Cited by in corpus (12)

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• Relativistic non-dipole effects in strong-field atomic ionization at moderate intensities
• Quantum Interference of Glory Rescattering in Strong-Field Atomic Ionization
• Nondipole effects in atomic dynamic interference
• Strong-field photoelectron holography beyond the electric dipole approximation: a semiclassical analysis
• Holographic interferences in strong-field ionization beyond the dipole approximation: The influence of the peak and focal volume averaged laser intensity
• Deuterium-tritium fusion process in strong laser fields: Semiclassical simulation
• Analytical approach to Coulomb focusing in strong field ionization
• Photon-momentum transfer in diatomic molecules: an ab initio study
• Sub-cycle time-resolved nondipole dynamics in tunneling ionization
• Subfemtosecond glory hologrammetry for vectorial optical waveform reconstruction
• Relativistic analytical R-matrix (ARM) theory for strong-field ionization