Phase- and helicity-dependent effects in three-color ionization |
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| Authors: | Magda Fifirig Marius Stroe |
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| Institution: | (1) Department of Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, R-70346 Bucharest, Romania |
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| Abstract: | We study the two-photon ionization of the hydrogen atom from its ground state by a three-color electromagnetic field consisting
of a superposition of an IR laser and two of its consecutive odd harmonics of order 2p−1 and 2p+1, withp a positive integer and constant relative phase difference. The ionization process due to the net absorption of the energy
2pħω (ω being the IR laser frequency) is considered. The influence of phase difference and helicity on the azimuthal angular distribution
of the ejected photoelectrons is illustrated in the case in which the two harmonics have identical polarizations. Phase effect
on the alignment of the differential ionization rate is also investigated. |
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| Keywords: | hydrogen atom multiphoton ionization quantum interference dichroic effects phase control |
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