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Indexed by:Journal Papers

Date of Publication:2015-11-05

Journal:CHEMICAL PHYSICS

Included Journals:SCIE、Scopus

Volume:461

Page Number:81-88

ISSN No.:0301-0104

Key Words:Molecular orientation; Two-color shaped laser pulse; THz laser pulse train

Abstract: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.