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Chin. Phys. B, 2020, Vol. 29(7): 074203    DOI: 10.1088/1674-1056/ab8ac0
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Photoelectron momentum distributions of single-photon ionization under a pair of elliptically polarized attosecond laser pulses

Hui-Fang Cui(崔会芳)1,2, Xiang-Yang Miao(苗向阳)1,2
1 College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China;
2 Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, Shanxi Normal University, Linfen 041004, China
Abstract  The attosecond ionization dynamics of atoms has attracted extensive attention in these days. However, the role of the initial state is not clearly understood. To address this question, we perform simulations on the neon atom and its model atom with different initial states by numerically solving the corresponding two-dimensional time-dependent Schrödinger equations. We theoretically investigate atomic photoelectron momentum distributions (PMDs) by a pair of elliptically polarized attosecond laser pulses. We find that the PMD is sensitive not only to the ellipticities of the pulses, the relative helicity, and time delay of the pulses, but also to the symmetry of the initial electronic states. Results are analyzed by the first-order time-dependent perturbation theory (TDPT) and offer a new tool for detecting the rotation direction of the ring currents.
Keywords:  photoelectron momentum distributions      elliptically polarized attosecond laser pulses      magnetic quantum numbers      rotation direction of the ring currents  
Received:  18 February 2020      Revised:  17 March 2020      Accepted manuscript online: 
PACS:  42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)  
  42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)  
  32.80.Wr (Other multiphoton processes)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11404204 and 11974229), the Natural Science Foundation for Young Scientists of Shanxi Province, China (Grant No. 201901D211404), the Scientific and Technological Innovation Program of Higher Education Institutions in Shanxi Province, China (Grant No. 2019L0468), and the Project of Excellent Course of Shanxi Normal University, China (Grant No. 2017YZKC-35).
Corresponding Authors:  Xiang-Yang Miao     E-mail:  sxxymiao@126.com

Cite this article: 

Hui-Fang Cui(崔会芳), Xiang-Yang Miao(苗向阳) Photoelectron momentum distributions of single-photon ionization under a pair of elliptically polarized attosecond laser pulses 2020 Chin. Phys. B 29 074203

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