title: Carrier-envelope phase dependence of molecular harmonic spectral minima induced by mid-infrared laser pulses.
abstract: The spectral minima in harmonic spectra of H2+ induced by mid-infrared laser pulses are numerically investigated based on two models of Born-Oppenheimer (BO) and non-Born-Oppenheimer (NBO) approximations. The simulation results show that, with the variation of the mid-infrared laser's carrier-envelope phase (CEP), the spectral minima positions (SMPs) are fixed for the BO model, while oscillate periodically for the NBO model. This can be understood by the two-center-destructive-interference theory via the detailed investigation to several physical quantities for each CEP case, such as SMPs, effective potential, internuclear separation and the electron's de Broglie wavelength at the time for interference occurring. The fittings to these quantities' CEP-dependent curves demonstrate that they follow a variation law in the form of a sine function.
authors.forename: Pidong
authors.initials: P
authors.lastname: Hu
authors.forename: Yueping
authors.initials: Y
authors.lastname: Niu
authors.forename: Yang
authors.initials: Y
authors.lastname: Xiang
authors.forename: Shangqing
authors.initials: S
authors.lastname: Gong
authors.forename: Chengpu
authors.initials: C
authors.lastname: Liu