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Over the last few years there has been a considerable interest in high-order harmonics
generation from solid surfaces as it may pave the route towards intense single attosecond x-ray pulses (AXP) [1]. These pulses will be a powerful tool in x-ray spectroscopy, plasma diagnostics etc. To obtain such pulses one needs few-cycle laser radiation with intensity exceeding the relativistic limit (for 1 micron wavelength Irel=1.37*1018 W/cm2).
However, it appears to be possible to use longer pulses for generation of single AXP. This possibility is based on polarization gating technique and was proposed for surface harmonics in [2]. In this talk we would like to present a more detailed study of polarization gating technique based on 1D and 3D PIC simulations.
[1] Yu. Mikhailova, V.T. Platonenko, and S.G. Rykovanov, JETP Letters, 31, 11 (2005); G.D. Tsakiris, K. Eidmann, J. Meyer-ter-Vehn and F. Krausz, NJP, 8 (2006); A. Pirozhkov, S. Bulanov, T. Esirkepov, M. Mori, A. Sagisaka, and H. Daido, Phys. Plasma, 13, 013107 (2006) [2] T. Baeva, S. Gordienko, A. Pukhov, Phys. Rev. E, 74, 065401 (2006) |
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