Molecular photoelectron momentum distributions by intense orthogonally polarized attosecond ultraviolet laser pulses

We study molecular photoelectron momentum distributions (MPMDs) of aligned H-2(+) by intense orthogonally polarized attosecond ultraviolet laser pulses. Photoionization is simulated by numerically solving corresponding three-dimensional time dependent Schrodinger equations with static nuclei. It is found that altering pulse phases phi varies the structure of MPMDs, which is attributed to the interference effect between orthogonal polarization ionizations. The phase phi dependent MPMDs are also a function of molecular alignment and pulse wavelengths. Altering the symmetry of initial electronic states offers the possibility of imaging molecular orbitals by orthogonal polarization attosecond MPMDs. (C) 2015 Elsevier B.V. All rights reserved.