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Accurate prediction of interference minima in linear molecular harmonic spectra by a modified two-center model |
| Xin Cui(崔鑫)1,2, Di-Yu Zhang(张頔玉)1,2, Gao Chen(陈高)3, Ji-Gen Chen(陈基根)4, Si-Liang Zeng(曾思良)5, Fu-Ming Guo(郭福明)1,2, Yu-Jun Yang(杨玉军)1,2 |
1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2. Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China;
3. School of Science, Changchun University of Science and Technology, Changchun 130022, China;
4. Department of Physics and Materials Engineering, Taizhou University, Taizhou 318000, China;
5. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China |
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Abstract We demonstrate that the interference minima in the linear molecular harmonic spectra can be accurately predicted by a modified two-center model. Based on systematically investigating the interference minima in the linear molecular harmonic spectra by the strong-field approximation (SFA), it is found that the locations of the harmonic minima are related not only to the nuclear distance between the two main atoms contributing to the harmonic generation, but also to the symmetry of the molecular orbital. Therefore, we modify the initial phase difference between the double wave sources in the two-center model, and predict the harmonic minimum positions consistent with those simulated by SFA.
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Received: 12 October 2015
Revised: 22 November 2015
Accepted manuscript online:
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PACS:
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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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 Basic Research Program of China (Grant No. 2013CB922200) and the National Natural Science Foundation of China (Grant Nos. 11274001, 11274141, 11304116, 11247024, and 11034003), and the Jilin Provincial Research Foundation for Basic Research, China (Grant Nos. 20130101012JC and 20140101168JC). |
Corresponding Authors:
Fu-Ming Guo
E-mail: guofm@jlu.edu.cn
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Cite this article:
Xin Cui(崔鑫), Di-Yu Zhang(张頔玉), Gao Chen(陈高), Ji-Gen Chen(陈基根), Si-Liang Zeng(曾思良), Fu-Ming Guo(郭福明), Yu-Jun Yang(杨玉军) Accurate prediction of interference minima in linear molecular harmonic spectra by a modified two-center model 2016 Chin. Phys. B 25 033205
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