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Effect of pump-1 laser on Autler Townes splitting in photoelectron spectrum of K2 molecule

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成果类型:
期刊论文
作者:
Guo Wei;Lu Xing-Qiang;Wang Xin-Lin;Yao Hong-Bin
通讯作者:
Lu, X.-Q.
作者机构:
School of Electric Engineering, University of South China, Hengyang, 421001, China
School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
Department of Basic Courses, Xinjiang Institute of Engineering, Urumqi, 830091, China
[Guo Huailiang; Wang Xin-Lin] School of Electric Engineering, University of South China
[Lu Xing-Qiang] School of Nuclear Science and Technology, University of South China
通讯机构:
[Lu Xing-Qiang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
School of Nuclear Science and Technology, University of South China, Hengyang, China
语种:
英文
关键词:
Autler-Townes splitting;Four-level ladder K2 molecule;Photoelectron spectra
期刊:
Chinese Physics B
期刊(中文):
中国物理B:英文版
ISSN:
1674-1056
年:
2015
卷:
24
期:
1
页码:
013302-1-013302-8
基金类别:
Project supported by the National Natural Science Foundation of China(Grant Nos.41104094 and 11174119); the Research Fund for the Doctoral Program of Higher Education of China(Grant No.20114324120002); the Research Foundation of Education Bureau of Hunan Province,China(Grant No.12C0370); the Scientific Research Foundation for the Returned Overseas Chinese Scholars;
机构署名:
本校为第一且通讯机构
院系归属:
电气工程学院
核科学技术学院
摘要:
We theoretically investigate the Autler–Townes(AT)splitting in the photoelectron spectrum of four-level ladder K_2 molecule driven by a pump 1-pump 2-probe pulse via employing the time-dependent wave packet approach.The effects of the pump-1 laser intensity and wavelength on AT splitting are studied for the first time.The magnitude of AT splitting increases with increasing the pump-1 laser intensity.The triple splitting with asymmetric profile occurs due to the nonresonant excitation.The triple structure is transformed into a double structure(near-resonant region),and then becomes a peak(far-off resonant region)progressively as the pump-1 laser is detuned from the resonance wavelength,which can be explained in terms of the asymmetric excitation/population of dressed states.The splitting between adjacent peaks and the splitting between the two sideband peaks in the triplet do not change with the pump-1 pulse wavelength.The three peaks shift toward lower energy with the same shift 1/4*△_1 as the pump-1 wavelength changes in near-resonant region.The asymptotic behaviors of AT splitting with the pump-1 laser intensity are interesting in the threshold points of the near-resonant region and the far-off resonant region.

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