title: Field-free molecular orientation with terahertz few-cycle pulses.
abstract: We demonstrate theoretically an efficient field-free orientation in LiH and LiCl driven by available terahertz few-cycle pulses (TFCPs). Exact results by numerically solving the time-dependent Schrodinger equation including the vibrational and rotational degrees of freedom are compared to the rigid-rotor approximation (RRA) as well as to the impulsive approximation (IA), and the effect of rotational-vibrational coupling on the both RRA and IA is examined in detail. We find that the current available TFCPs may overcome the technical limitation of terahertz half-cycle pulse for enhancing the field-free molecular orientation.
authors.affiliation: Department of Physics, Dalian University of Technology, Dalian 116024, China. sccchenmo@126.com
authors.forename: Chuan-Cun
authors.initials: CC
authors.lastname: Shu
authors.forename: Kai-Jun
authors.initials: KJ
authors.lastname: Yuan
authors.forename: Wen-Hui
authors.initials: WH
authors.lastname: Hu
authors.forename: Shu-Lin
authors.initials: SL
authors.lastname: Cong