Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference

doi:10.1088/1674-1056/23/1/013302

Chin. Phys. B ›› 2014, Vol. 23 ›› Issue (1): 13302-013302.doi: 10.1088/1674-1056/23/1/013302

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference

秦朝朝^{a b}, 贾光瑞^a, 张现周^a, 刘玉芳^a, 龙金友^b, 张冰^b

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

收稿日期:2013-05-22 修回日期:2013-06-26 出版日期:2013-11-12 发布日期:2013-11-12
基金资助:
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), and the Key Scientific and Basic Technology Research Program of Henan Province, China (Grant Nos. 102102210184 and 122300410109).

Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference

Qin Chao-Chao (秦朝朝)^{a b}, Jia Guang-Rui (贾光瑞)^a, Zhang Xian-Zhou (张现周)^a, Liu Yu-Fang (刘玉芳)^a, Long Jin-You (龙金友)^b, Zhang Bing (张冰)^b

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

Received:2013-05-22 Revised:2013-06-26 Online:2013-11-12 Published:2013-11-12
Contact: Qin Chao-Chao E-mail:qinchao@mail.ustc.edu.cn
Supported by:
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), and the Key Scientific and Basic Technology Research Program of Henan Province, China (Grant Nos. 102102210184 and 122300410109).

摘要/Abstract

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.

关键词: molecular orientation, femtosecond dual-color laser pulse, quantum interference

Abstract: 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.

Key words: molecular orientation, femtosecond dual-color laser pulse, quantum interference

中图分类号: (Photon interactions with molecules)

33.80.-b

37.10.Vz (Mechanical effects of light on atoms, molecules, and ions) 33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

秦朝朝, 贾光瑞, 张现周, 刘玉芳, 龙金友, 张冰. Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference[J]. Chin. Phys. B, 2014, 23(1): 13302-013302.

Qin Chao-Chao (秦朝朝), Jia Guang-Rui (贾光瑞), Zhang Xian-Zhou (张现周), Liu Yu-Fang (刘玉芳), Long Jin-You (龙金友), Zhang Bing (张冰). Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference[J]. Chin. Phys. B, 2014, 23(1): 13302-013302.

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Field-free molecular orientation induced by combined femtosecond single- and dual-color laser pulses：The role of delay time and quantum interference

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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