Extended Data Fig. 2: Interference contrast γ for chirped-pulse double interaction.
From: Attosecond electron microscopy by free-electron homodyne detection
a-c, Interference contrast as a function of group delay dispersion (GDD) and electron pulse duration for three different initial transform-limited laser pulse durations which corresponds to different initial bandwidths (wider to narrower). The white arrow indicates that the electric field envelope of the chirped laser is longer than the interaction time difference which is necessary to have a sufficient interaction strength at the two points. Our experimental parameters correspond to (b) where the chirp and electron pulse duration is indicated by the white dot.
