| Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference |
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| 作者姓名： | 秦朝朝 贾光瑞 张现周 刘玉芳 龙金友 张冰 |
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| 作者单位： | a Department of Physics, Henan Normal University, Xinxiang 453007, China;b State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.61077037 and 11274096);the Doctoral Research Fund of Henan Normal University,China(Grant No.qd12109);the Key Scientific and Basic Technology Research Program of Henan Province,China(Grant Nos.102102210184 and 122300410109) |
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| 摘 要： | The coherent control of field-free molecular orientation of CO with combined femtosecond single- and dual-color laser pulses has been theoretically studied. The effect of the delay time between the femtosecond single- and dual-color laser pulses is discussed, and the physical mechanism of the enhancement of molecular orientation with pre-alignment of the molecule is investigated. It is found that the basic mechanism is based on the creation of a rotational wave packet by the femtosecond single-color laser pulse. Furthermore, we investigate the interference between multiple rotational excitation pathways following pre-alignment with femtosecond single-color laser pulse. It is shown that such interference can lead to an enhancement of the orientation of CO molecule by a factor of 1.6.
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| 关 键 词： | molecular orientation femtosecond dual-color laser pulse quantum interference |
| 收稿时间： | 2013-05-22 |
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