Classical simulations of electron emissions from H2+ by circularly polarized laser pulses

With the classical fermion molecular dynamics model (FMD), we investigated electron emissions from H-2(+) by circularly polarized laser pulses. The obtained electron momentum distribution clearly shows an angular shift relative to the expected direction for H-2(+) aligned parallel to the polarization plane, which is in good agreement with the recent experimental result. By tracing the classical trajectory, we provide direct evidence for the electron delayed emission with respect to the instant when the electric field is parallel to the molecular axis, which was regarded as the origin of the angular shift in the electron momentum distribution. Furthermore, we find that the angular shift decreases with increasing the laser wavelength. (C) 2012 Optical Society of America