Browsing by Author "Han, CS"

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Two-color above-threshold ionization of atoms
(1996-06-01)
Han, CS
;
電子物理學系
;
Department of Electrophysics
A nonperturbative method is used to study the two-color multiphoton ionization of atoms by solving the Schrodinger equation in momentum space, which facilitates the extraction of the rapidly varying part of the wave function. Our method generalizes the problem for cases where an arbitrary number of ionization photons are absorbed, and also takes into account the threshold shifts due to both the high- and low-frequency fields. The photoelectron energy spectra of the hydrogen atoms are calculated and the dependence on the laser field strengths and frequencies is discussed.
Two-color multiphoton ionization of atoms
(1997-05-01)
Han, CS
;
電子物理學系
;
Department of Electrophysics
We present a theoretical study on the two-color multiphoton ionization of atoms using a nonperturbative method of solving the Schrodinger equation in momentum space. We generalize the problem for absorption of an arbitrary number of ionization photons and especially focus on the absorption of additional above-threshold high-frequency photons. A systematic calculation on the photoelectron energy spectra for the hydrogen atom is performed.