| ATOMIC AND MOLECULAR PHYSICS |
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Above-Threshold Ionization of Xenon by Chirped Intense Laser Pulses |
| WANG Chuan-Liang1,2, SUN Ren-Ping1,2, CHEN Yong-Ju1,2, GONG Cheng1, LAI Xuan-Yang1, KANG Hui-Peng1, QUAN Wei1, LIU Xiao-Jun1** |
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
2University of Chinese Academy of Sciences, Beijing 100090
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| Cite this article: |
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WANG Chuan-Liang, SUN Ren-Ping, CHEN Yong-Ju et al 2014 Chin. Phys. Lett. 31 063202 |
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Abstract We experimentally investigate above-threshold ionization of xenon subject to chirped intense laser pulses. While for few-cycle laser pulses free of chirp, the Freeman resonance narrow peaks in the photoelectron spectra become strongly suppressed, they will re-emerge for laser pulses with a certain chirp. Moreover, the position of the resonant peaks exhibits a strong dependence on the direction of the chirp. The experimental features can be understood by a two-step ionization process; that is, a multi-photon excitation plus subsequent ionization process.
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Published: 26 May 2014
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| PACS: |
32.80.Fb
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(Photoionization of atoms and ions)
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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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