Field-free molecular orientation by two-color femtosecond laser pulse and time-delayed THz laser pulse
We propose a scheme for achieving molecular orientation steered by the combination of a nonresonant two-color femtosecond laser pulse and a time-delayed THz laser pulse.It is shown that the molecular negative and positive orientation can be significantly enhanced by applying this scheme compared to the single femtosecond or THz laser pulse.The effects of the intensity of the two-color femtosecond laser pulse and the delay time between the femtosecond laser pulse and the THz laser pulse on molecular orientation are discussed.The molecular orientation also depends on the carrier-envelope phase of the THz laser pulse and the initial rotational temperature of the molecule.The maximal negative and positive orientation degrees calculated are < cosθ> nmax = 0.828 and < cosθ> pmax = 0.755,respectively.
molecular orientation two-color femtosecond laser pulse THz laser pulse
Hai-Ping Dang Shuo Wang Wei-Shen Zhan Xiao Han Jing-Bo Zai
School of Science,Dalian University of Technology,Panjin 124221,People”s Republic of China
国内会议
大连
英文
211-216
2016-09-24（万方平台首次上网日期，不代表论文的发表时间）