High-order Harmonic Generation from Molecular Hydrogen

ORAL

Abstract

High-order harmonics generated in molecular hydrogen gas by an 800 nm driving laser are compared to those generated in argon gas under the same driving laser intensity and gas pressure. We find that the yield of HHG from hydrogen gas is approximately an order of magnitude less than that of argon HHG although the ionization probabilities of the two gases are equal at intensities above 3$\times $10$^{14}$ W/cm$^{2}$. We propose that the reduced HHG yield results from the low recombination cross-section of hydrogen.

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Authors

  • Michael Chini

    • CREOL and Department of Physics, University of Central Florida
    • College of Optics and Photonics and Department of Physics, University of Central Florida

  • Xiaowei Wang

    • CREOL and Department of Physics, University of Central Florida
    • National University of Defense of China, Department of Physics

  • Qi Zhang

    • CREOL and Department of Physics, University of Central Florida
    • College of Optics and Photonics and Department of Physics, University of Central Florida

  • Kun Zhao

    • CREOL and Department of Physics, University of Central Florida

  • Yi Wu

    • CREOL and Department of Physics, University of Central Florida
    • College of Optics and Photonics and Department of Physics, University of Central Florida

  • Zenghu Chang

    • CREOL and Department of Physics, University of Central Florida