High-Order Above-Threshold Ionization of Heteronuclear
Diatomic Molecules by a Strong Laser Field with Arbitrary
Polarization¹

E. Hasovi^{a, b}, D. B. Milosevi^{a, b, c}, M. Busuladi^d, A. Gazibegovi-Busuladi^a, and W. Becker^b

^a Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina

^b Max-Born-Institut, Max-Born-Str. 2a, 12489 Berlin, Germany

^c Academy of Sciences and Arts of Bosnia and Herzegovina, Bistrik 7, 71000 Sarajevo, Bosnia, and Herzegovina

^d Medical Faculty, University of Sarajevo, ekalua 90, 71000 Sarajevo, Bosnia and Herzegovina

Received October 31, 2011

Abstract—The molecular strong-field approximation is applied to calculate angle-resolved photoelectron
spectra in the process of high-order above-threshold ionization of carbon-monoxide molecules by an elliptically
polarized laser field. The theory is formulated to include the Stark shift of the initial bound state of the valence
electron. It is shown that the angle-resolved photoelectron spectra of aligned CO molecules exhibit pronounced
minima which can be explained by destructive interference of two partial T-matrix contributions. The depen-
dence of contributing partial amplitudes on the laser field ellipticity is analyzed in detail.

DOI: 10.1134/S1054660X12120122

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