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Relativistic high harmonics and (sub-)attosecond pulses: relativistic spikes and relativistic mirror

  • A. Pukhov
  • T. Baeva
  • D. an der Brügge
  • S. Münster
Topical issue: Fundamental Physics and Ultra-High Laser Fields

Abstract

Using particle-in-cell simulations, we study high harmonic generation from overdense plasmas in the relativistic regime. Different incidence angles as well as different laser polarizations are considered and scalings are recovered. It is shown that the theory of relativistic spikes and the BGP power-law spectra [Phys. Rev. E 74, 046404 (2006)] describes well the normal incidence and s-polarized obliquely incident laser pulses. In the case of p-polarized laser pulses, exceptions from the BGP theory can appear when the quasi-static vector potential build-up at the plasma boundary becomes equal to that of the laser. In this case, the spectrum flattens significantly and has a lower cutoff.

PACS

52.27.Ny Relativistic plasmas 42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • A. Pukhov
    • 1
  • T. Baeva
    • 1
  • D. an der Brügge
    • 1
  • S. Münster
    • 1
  1. 1.Institut für Theoretische Physik I, Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany

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