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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, Xing-Qiang
作者机构:
[Guo Wei; Wang Xin-Lin] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
[Lu Xing-Qiang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
[Yao Hong-Bin] Xinjiang Inst Engn, Dept Basic Courses, Urumqi 830091, Peoples R China.
通讯机构:
School of Nuclear Science and Technology, University of South China, Hengyang, China
语种:
英文
关键词:
Autler–Townes splitting;photoelectron spectra;four-level ladder K_2 molecule
关键词(中文):
激光强度;光电子能谱;泵浦;分裂;分子;汤斯;共振波长;脉冲驱动;photoelectron spectra;four-level ladder K2 molecule
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:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41104094, 11174119]; Research Fund for the Doctoral Program of Higher Education of ChinaResearch Fund for the Doctoral Program of Higher Education of China (RFDP)Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) [20114324120002]; Research Foundation of Education Bureau of Hunan Province, China [12C0370]; Scientific Research Foundation for the Returned Overseas Chinese ScholarsScientific Research Foundation for the Returned Overseas Chinese Scholars
机构署名:
本校为第一机构
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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