点击次数：

论文类型：期刊论文

发表时间：2015-11-05

发表刊物：CHEMICAL PHYSICS

收录刊物：SCIE、Scopus

卷号：461

页面范围：81-88

ISSN号：0301-0104

关键字：Molecular orientation; Two-color shaped laser pulse; THz laser pulse train

摘要：Field-free orientation of CO molecule is studied theoretically by combining a nonresonant two-color shaped laser pulse with a time-delayed THz laser pulse train. The molecular positive and negative orientation degrees can be significantly enhanced by the combination of two-color shaped laser pulse and THz laser pulse train compared with the single THz laser pulse train. The effects of the pulse number of THz laser pulse train and the delay time between two-color shaped laser pulse and THz laser pulse train on molecular orientation are discussed. Further, the influence of the initial rotational temperature on molecular orientation is investigated. The maximal positive and negative orientation degrees obtained are < cos theta >(pmax) = 0.91 and < cos theta >(nmax) = 0.89, respectively. (C) 2015 Elsevier B.V. All rights reserved.