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Phys Rev Lett. 2017 Mar 3;118(9):093001. doi: 10.1103/PhysRevLett.118.093001. Epub 2017 Feb 27.

Limits of Strong Field Rescattering in the Relativistic Regime.

Author information

1
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
2
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
3
Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA.

Abstract

Recollision for a laser driven atomic system is investigated in the relativistic regime via a strong field quantum description and Monte Carlo semiclassical approach. We find the relativistic recollision energy cutoff is independent of the ponderomotive potential U_{p}, in contrast to the well-known 3.2U_{p} scaling. The relativistic recollision energy cutoff is determined by the ionization potential of the atomic system and achievable with non-negligible recollision flux before entering a "rescattering free" interaction. The ultimate energy cutoff is limited by the available intensities of short wavelength lasers and cannot exceed a few thousand Hartree, setting a boundary for recollision based attosecond physics.

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