中国物理B ›› 2018, Vol. 27 ›› Issue (5): 53301-053301.doi: 10.1088/1674-1056/27/5/053301

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Delay time dependence of wave packet motion and population transfer of four-level K2 molecule in pump-pump-probe pulses

Zhiqiang Chang(常志强), Changming Li(李昌明), Wei Guo(郭玮), Hongbin Yao(姚洪斌)   

  1. 1 School of Electrical Engineering, University of South China, Hengyang 421001, China;
    2 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China;
    3 Key Laboratory of New Energy and Materials, Xinjiang Institute of Engineering, Urumqi 830091, China
  • 收稿日期:2018-01-17 修回日期:2018-03-01 出版日期:2018-05-05 发布日期:2018-05-05
  • 通讯作者: Wei Guo E-mail:vella99@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11704178 and 11764041) and the Scientific Research Fund of Hunan Provincial Education Department,China (Grant No.15B204).

Delay time dependence of wave packet motion and population transfer of four-level K2 molecule in pump-pump-probe pulses

Zhiqiang Chang(常志强)1, Changming Li(李昌明)1, Wei Guo(郭玮)1,2, Hongbin Yao(姚洪斌)3   

  1. 1 School of Electrical Engineering, University of South China, Hengyang 421001, China;
    2 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China;
    3 Key Laboratory of New Energy and Materials, Xinjiang Institute of Engineering, Urumqi 830091, China
  • Received:2018-01-17 Revised:2018-03-01 Online:2018-05-05 Published:2018-05-05
  • Contact: Wei Guo E-mail:vella99@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11704178 and 11764041) and the Scientific Research Fund of Hunan Provincial Education Department,China (Grant No.15B204).

摘要: The effect of delay time on photoelectron spectra and state populations of a four-level ladder K2 molecule is investigated by a pump1-pump2-probe pulse via the time-dependent wave packet approach. The periodical motion of the wave packet leads to the periodical change of the photoelectron spectra. The Autler-Townes triple splitting appears at zero delay time, double splitting appears at nonzero delay time between pump1 and pump2 pulses, and no splitting appears at nonzero delay time between pump2 and probe pulses. The periodical change of the state populations with the delay time may be due to the coupling effect between the two pulses. It is found that the selectivity of the state populations may be attained by regulating the delay time. The results can provide an important basis for realizing the optical control of molecules experimentally.

关键词: wave packet motion, population transfer, intense femtosecond pump1-pump2-probe pulse, four-level ladder K2 molecule

Abstract: The effect of delay time on photoelectron spectra and state populations of a four-level ladder K2 molecule is investigated by a pump1-pump2-probe pulse via the time-dependent wave packet approach. The periodical motion of the wave packet leads to the periodical change of the photoelectron spectra. The Autler-Townes triple splitting appears at zero delay time, double splitting appears at nonzero delay time between pump1 and pump2 pulses, and no splitting appears at nonzero delay time between pump2 and probe pulses. The periodical change of the state populations with the delay time may be due to the coupling effect between the two pulses. It is found that the selectivity of the state populations may be attained by regulating the delay time. The results can provide an important basis for realizing the optical control of molecules experimentally.

Key words: wave packet motion, population transfer, intense femtosecond pump1-pump2-probe pulse, four-level ladder K2 molecule

中图分类号:  (Photoelectron spectra )

  • 33.60.+q
33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)