Photoelectron energy spectra from elastic rescattering in ultrastrong laser fields: A relativistic extension of the three-step model

S. S. Luo, P. D. Grugan, and B. C. Walker
Phys. Rev. A 91, 033412 – Published 26 March 2015

Abstract

Using a relativistic adaptation of a three-step recollision model we calculate photoelectron energy spectra for ionization with elastic scattering in ultrastrong laser fields up to 24 a.u. (2×1019 W/cm2). Hydrogenlike and noble gas species with Hartree-Fock scattering potentials show a reduction in elastic rescattering beyond 6×1016 W/cm2 when the laser Lorentz deflection of the photoelectron exceeds its wave-function spread. A relativistic rescattering enhancement occurs at 2×1018 W/cm2, commensurate with the relativistic motion of a classical electron in a single field cycle. The noble gas results are compared with available experiments. The theory approach is well suited to modeling scattering in the ultrastrong intensity regime that lies between traditional strong fields and extreme relativistic interactions.

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  • Received 1 November 2014
  • Revised 29 January 2015

DOI:https://doi.org/10.1103/PhysRevA.91.033412

©2015 American Physical Society

Authors & Affiliations

S. S. Luo, P. D. Grugan, and B. C. Walker*

  • Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA

  • *bcwalker@udel.edu

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Issue

Vol. 91, Iss. 3 — March 2015

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