Attosecond Nonlinear Fourier Transform Molecular Spectroscopy

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  • OKINO Tomoya
    Attosecond Science Research Team, RIKEN Center for Advanced Photonics
  • FURUKAWA Yusuke
    Attosecond Science Research Team, RIKEN Center for Advanced Photonics
  • NABEKAWA Yasuo
    Attosecond Science Research Team, RIKEN Center for Advanced Photonics
  • YAMANOUCHI Kaoru
    Department of Chemistry, School of Science, The University of Tokyo
  • MIDORIKAWA Katsumi
    Attosecond Science Research Team, RIKEN Center for Advanced Photonics

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Other Title
  • アト秒非線形フーリエ分子分光
  • アトビョウ ヒセンケイ フーリエ ブンシ ブンコウ

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Abstract

Nonlinear Fourier transform spectroscopy is extended to the attosecond temporal domain and extreme ultraviolet wavelength region to perform two-color two-photon photofragment excitation spectroscopy of molecules and to investigate ultrafast molecular dynamics such as temporal evolution of vibrational and electronic wavepackets. Molecular nonlinear responses are encoded in the fringe-resolved autocorrelation trace of an attosecond pulse train through non-sequential two-photon processes. Femtosecond vibrational motion of molecules can be traced in real-time through sequential two-photon processes. By introducing a velocity map imaging spectrometer, momentum image of photofragment ions and/or photoelectrons can be measured to investigate coupled electron-nuclear dynamics from femtosecond to attosecond.

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