Electron localization of H₂⁺ in a dc electric field

A dc electric field is utilized to steer the electron motion after the molecular ion H₂⁺ is excited by an ultrashort ultraviolet laser pulse. The numerical simulation shows that the electron localization distribution and the dissociation control ratio are dependent on the polarization direction and amplitude of the dc electric field. Most electrons of the dissociation state move opposite to the dc electric field and stabilize at the dressed-up potential well, for the dressed-down well is occupied by the electrons of the 1sσ_g state.