Figure 4
From: Nonsequential double ionization with mid-infrared laser fields
An example second-returning NSDI trajectory for 3200 nm with peak laser intensity 1.0 × 1014 W/cm2.
Dashed blue curves are for the first-emitted electron (e1) and solid red curves are for the second-emitted electron (e2). The upper panel shows the distances of the two electrons from the ion core as a function of time during the laser pulse, and the lower panel shows the velocities of the two electrons as a function of time. The inset on the upper panel is a zoom in the early portion of the pulse, enlarging the two returning events.
