The carrier-envelope phase effect in non-sequential double ionization by few-cycle linearly polarized laser field

Using the two-dimensional classical ensemble method, we investigate the nonsequential double-ionization (NSDI) processes of Ar atom by few-cycle linearly polarized laser field. We demonstrate that the recollision-induced excitation with subsequent ionization (RESI) and the recollision-induced ionization (RII) channels can be effectively controlled by laser intensities. Moreover, the carrier-envelope-phases (CEPs) play a key role in controlling RESI and RII mechanism. The correlated electron momentum distribution is demonstrated for the RII and RESI channels at different CEPs and intensities.