Influence of the Coulomb potential on above-threshold ionization:a quantum-orbit analysis beyond the strong-field approximation

Lai, X.-Y. and Poli, Charles Joseph and Schomerus, Henning Ulrich and Figueira de Morrison Faria, C. (2015) Influence of the Coulomb potential on above-threshold ionization:a quantum-orbit analysis beyond the strong-field approximation. Physical review a, 92 (4). ISSN 1050-2947

[img]
Preview
PDF (CQSFA_Aug2015)
CQSFA_Aug2015.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial.

Download (776kB)
[img]
Preview
PDF (PhysRevA.92.043407)
PhysRevA.92.043407.pdf - Published Version

Download (865kB)

Abstract

We perform a detailed analysis of how the interplay between the residual binding potential and a strong laser field influences above-threshold ionization (ATI), employing a semianalytical, Coulomb-corrected strong-field approximation (SFA) in which the Coulomb potential is incorporated in the electron propagation in the continuum. We find that the Coulomb interaction lifts the degeneracy of some SFA trajectories and we identify a set of orbits that, for high enough photoelectron energies, may be associated with rescattering. Furthermore, by performing a direct comparison with the standard SFA, we show that several features in the ATI spectra can be traced back to the influence of the Coulomb potential on different electron trajectories. These features include a decrease in the contrast, a shift towards lower energies in the interference substructure, and an overall increase in the photoelectron yield. All features encountered exhibit very good agreement with the ab initio solution of the time-dependent Schrödinger equation.

Item Type:
Journal Article
Journal or Publication Title:
Physical review a
Additional Information:
©2015 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
ID Code:
76532
Deposited By:
Deposited On:
11 Nov 2015 14:24
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Sep 2020 03:36