Fig. 3: Semiclassical statistical analysis of the initial distribution of electron trajectories.

a The distribution of initial ionization times for the photoelectron contributing to the MPEA in the first ATI. The instant of the electric field peak is assumed as time zero. c Simulated time-dependent evolution of electrons from the momentum bin of MPEA. b, d The time-dependent evolution of photoelectron momentum projections in the z and y directions, respectively. Tf is the moment the laser field ends. The colors of the trajectories are used to guide the eye