Nonadiabatic effects in the double ionization of atoms driven by a circularly polarized laser pulse.

摘要: We study the double ionization of atoms subjected to circularly polarized (CP) laser pulses. analyze two fundamental processes: sequential (SDI) and non-sequential (NSDI) in light rotating frame (RF) which naturally embeds nonadiabatic effects CP use compare adiabatic approximations: The approximation laboratory (LF) RF. RF encapsulates energy variations electrons on subcycle timescales happening LF this, by fully taking into account ion-electron interaction. This allows us identify including lowering threshold intensity at over-the-barrier happens time electrons. As a consequence, these facilitate recollision-induced ionizations. outcomes recollision mechanism. show that envelope plays an instrumental role channel pulses heart NSDI.