Threshold shift and above-threshold multiphoton ionization of atomic hydrogen in intense laser fields

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Issue Date
1985-11-01Author
Chu, Shih-I
Cooper, J.
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
Accurate ab initio nonperturbative L2 non-Hermitian Floquet calculations for intensity-dependent threshold shifts and ground-state total ionization widths (rates) for one-, two-, and three-photon-dominant intense-field ionization of atomic hydrogen are presented. The results show the importance of both the ac Stark shift and the pondermotive potential in the determination of the net threshold shift. In addition, branching ratios to individual continua have been estimated, yielding physical insights regarding the general features and mechanisms of the frequency- and intensity-dependent continuum-continuum transitions and ‘‘peak switching’’ phenomena in the above-threshold ionization processes.
Description
This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.32.2769.
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Citation
Chu, Shih-I. & Cooper, J. "Threshold shift and above-threshold multiphoton ionization of atomic hydrogen in intense laser fields." Phys. Rev. A 32, 2769 – Published 1 November 1985. http://dx.doi.org/10.1103/PhysRevA.32.2769.
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