抄録
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.
