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Mass shift effect on relativistic high-order harmonic generation

Guo Fu-Ming Chen Ji-Gen Yang Yu-Jun Zeng Si-Liang

Mass shift effect on relativistic high-order harmonic generation

Guo Fu-Ming, Chen Ji-Gen, Yang Yu-Jun, Zeng Si-Liang
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  • Abstract views:  1360
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  • Received Date:  12 April 2012
  • Accepted Date:  29 May 2012
  • Published Online:  05 September 2012

Mass shift effect on relativistic high-order harmonic generation

  • 1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
  • 2. Department of Physics and Materials Engineering, College of Physics and Electronic Engineering, Taizhou University, Taizhou 318000, China;
  • 3. Science and Technology Computation Physics Laboratory, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 10904006, 11034003, 11105015, 11075023), the Natural Science Foundation of Zhejiang Province (Grant No. Y6110578), and Science and Technology Funds of China Academy of Engineering Physics (Grant No. 2011B0102026, 2011A0102007).

Abstract: By solving the time-dependent Dirac and Schrödinger equations, we investigate the super high-order harmonic generation (HHG) from a one-dimensional model atom in a relativistic intense laser pulse. Our numerical simulations show that the relativistic results can be degraded to non-relativistic ones in the weak laser field, and the clear effect of the relativistic mass-shift can be gradually observed as the increase of the laser field intensity. Furthermore, the cutoff frequency and the emission efficiency of the HHG spectrum are analyzed by the wavelet time-frequency analysis and the relativistic "three-step" model.

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