| ATOMIC AND MOLECULAR PHYSICS |
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Quantum Path Selection and Isolated-Attosecond-Pulse Generation of H2+ with an Intense Laser Pulse and a Static Field |
| MIAO Xiang-Yang**, LIU Sha-Sha |
College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004
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| Cite this article: |
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MIAO Xiang-Yang, LIU Sha-Sha 2015 Chin. Phys. Lett. 32 013301 |
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Abstract We theoretically investigate the high-order-harmonic generation from the H2+ molecular ion exposed to the combination of an intense trapezoidal laser and a static field. The results show that the harmonic spectrum is obviously extended and the short quantum path is selected to contribute to the spectrum, because the corresponding long path is seriously suppressed. Then the combined Coulomb and laser field potentials and the time-dependent electron wave packet distributions are applied to illustrate the physical mechanism of high-order harmonic generation. Finally, by adjusting the intensity of the static field and superposing a properly selected range of the HHG spectrum, a 90-as isolated attosecond pulse is straightforwardly obtained.
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Published: 23 December 2014
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| PACS: |
33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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31.30.Gs
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(Hyperfine interactions and isotope effects)
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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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