Fig. 4: Alignment-angle-dependent attosecond charge migration in N\({}_{2}^{+}\) and CO\({}_{2}^{+}\).
From: Filming movies of attosecond charge migration in single molecules with high harmonic spectroscopy

a–c Snapshots of the reconstructed hole densities in CO\({}_{2}^{+}\) for the alignment angles of 15°, 45° and 90°, respectively. d Flux of charge density crossing the x = 0 plane for the three angles in (a–c). e Same as (d), but for the y = 0 plane. Positive value means charge migration from +x (+y) side to −x (−y) side. f–h Snapshots of the reconstructed hole densities in N\({}_{2}^{+}\) for the alignment angles of 0°, 60°, and 90°, respectively. i Flux of charge density crossing the plane of x = −1.5 a.u. for the three angles in (f–h). j Same as (i), but for the y = 0 plane.