Photoionization of H2+ by circularly polarized laser field

► The photoelectron momentum spectra have an annular structure and the radiuses are dependent on the laser intensity. ► For molecule with bonding electronic states, the photoelectron momentum spectra show a rotation of π/2 with respect to the molecular axis. ► For molecule with antibonding electronic states, generally, no rotation appears. ► We use an interference scenario to interpret these phenomena.