Floquet study of ionization and high-order harmonic generation for a hydrogen atom in high-frequency laser fields |
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| Authors: | T. Cheng J. Liu S. Chen |
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| Affiliation: | (1) Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, Beijing 100080, P.R. China, CN;(2) Center for nonlinear studies, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009-28, Beijing 100088, P.R. China, CN |
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| Abstract: | In this paper, we investigate the dynamics of a hydrogen atom in high-frequency (several atomic units) super strong (up to several tens of atomic units) laser fields within the high frequency Floquet theory framework. The ionization rate, ionization spectrum, angular distribution and high-order harmonic generation are all investigated. Our studies reveal the universal behavior of the total ionization rate, excess-photon ionization spectrum and angular distribution of the ionization rate in the stabilization regime, and achieve a deep insight into the dynamics of high-order harmonic generation in the stabilization regime. Received 6 June 2001 and Received in final form 31 August 2001 |
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| Keywords: | PACS. 32.80.Rm Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) – 32.80.Fb Photoionization of atoms and ions – 42.50.Hz Strong-field excitation of optical transitions in quantum systems multi-photon processes dynamic Stark shift |
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