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

doi:10.1088/1674-1056/27/5/053301

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.

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

Received: 17 January 2018
Revised: 01 March 2018
Accepted manuscript online:

PACS:	33.60.+q	(Photoelectron spectra )
	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)

Fund: 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).

Corresponding Authors: Wei Guo
E-mail: vella99@163.com

Cite this article:

Zhiqiang Chang(常志强), Changming Li(李昌明), Wei Guo(郭玮), Hongbin Yao(姚洪斌) Delay time dependence of wave packet motion and population transfer of four-level K₂ molecule in pump-pump-probe pulses 2018 Chin. Phys. B 27 053301

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

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