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Imprints of molecular orbitals using photoelectron angular distribution by strong laser pulses of circular polarization |
| Ren Xiang-He (任向河)a, Zhang Jing-Tao (张敬涛)b, Wu Yan (吴艳)c, Ma Hui (马慧)a, Xu Yu-Long (许玉龙)a |
a School of Sciences, Shandong Polytechnic University, Jinan 250353, China;
b State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
c Department of Physics, Zhejiang University of Science & Technology, Hangzhou 310018, China |
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Abstract We theoretically investigate the strong-field ionization of H2+ molecules in four different electronic states by calculating photoelectron angular distributions in circularly polarized fields. We find that the structure of photoelectron angular distribution depends on the molecular orbital as well as the energy of photoelectron. The location of main lobes changes with the symmetric property of the molecular orbital. Generally, for molecules with bonding electronic states, the photoelectron's angular distribution shows a rotation of π/2 with respect to the molecular axis, while for molecules with antibonding electronic states, no rotation occurs. We use an interference scenario to interpret these phenomena. We also find that, due to the interference effect, a new pair of jets appears in the waist of the main lobes, and the main lobes or jets of photoelectron's angular distribution are split into two parts if the photoelectron energy is sufficiently high.
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Received: 12 December 2012
Revised: 21 January 2013
Accepted manuscript online:
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PACS:
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33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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34.50.Gb
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(Electronic excitation and ionization of molecules)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11104167, 11174304, and 61078080) and the Excellent Middle-Aged and Youth Scientist Award of Shandong Province, China (Grant No. BS2011SF021). |
Corresponding Authors:
Ren Xiang-He, Zhang Jing-Tao
E-mail: xhren101@spu.edu.cn;jtzhang@siom.ac.cn
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Cite this article:
Ren Xiang-He (任向河), Zhang Jing-Tao (张敬涛), Wu Yan (吴艳), Ma Hui (马慧), Xu Yu-Long (许玉龙) Imprints of molecular orbitals using photoelectron angular distribution by strong laser pulses of circular polarization 2013 Chin. Phys. B 22 073304
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