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FENG Liqiang, LIU Hang, LIU Hui. Spatial distribution of H2+ radiation harmonics in spatial homogeneous and inhomogeneous fields[J]. LASER TECHNOLOGY, 2017, 41(4): 467-472. DOI: 10.7510/jgjs.issn.1001-3806.2017.04.002
Citation: FENG Liqiang, LIU Hang, LIU Hui. Spatial distribution of H2+ radiation harmonics in spatial homogeneous and inhomogeneous fields[J]. LASER TECHNOLOGY, 2017, 41(4): 467-472. DOI: 10.7510/jgjs.issn.1001-3806.2017.04.002
shu

Spatial distribution of H2+ radiation harmonics in spatial homogeneous and inhomogeneous fields

  • 1.

    College of Science, Liaoning University of Technology, Jinzhou 121001, China

  • 2.

    State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

  • 3.

    School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China

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  • Received Date: September 09, 2016
  • Revised Date: September 27, 2016
  • Published Date: July 24, 2017
    Graphical Abstract
    • Abstract
  • In order to understand spatial distribution of H2+ molecular harmonics, the spatial distribution of H2+ molecular harmonic spectra in spatial homogeneous and inhomogeneous fields was studied through solving non-Bohn-Oppenheimer time-dependent Schr dinger equation. The results show that in spatial homogeneous field, harmonic intensity from positive-H nucleus is higher than that from negative-H nucleus. In spatial inhomogeneous field, due to plasma resonance on metallic nanostructure surface, harmonic cutoff is extended, and harmonic intensity from negative-H nucleus is higher than that from positive-H nucleus. Furthermore, spatial distribution of the harmonics can be explained by ionization probability, electron localization in two nuclei, time-dependent wave function and time-frequency analyses of harmonic spectra. Finally, by superposing a selected harmonics properly, an isolated ultrashort 36as pulse can be obtained. The investigation is helpful for understanding spatial distribution of molecular harmonics and producing attosecond pulses.
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    • References (24)
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