Attosecond electron interferometry for measurement of the quantum phase of free-electron wave packets

摘要

Single-photon ionization of a hydrogen atom irradiated by two time-delayed isolated attosecond pulsesnis theoretically investigated by numerically solving the fully three-dimensional time-dependent Schr¨odingernequation. It is demonstrated that the analysis of the angular-resolved electron energy spectrum, showing ancomplex interference pattern, allows one to completely retrieve the difference between the energy-dependentnphases of the electron wave packets generated by the two delayed attosecond pulses. Moreover, it is shown thatnin the case of a pair of excitation pulses with the same chirp rate, the proposed interferometric technique can benused to measure the difference between the carrier envelope phase values of two attosecond pulses.