Abstract
Molecular strong-field approximation in the frame of the S-matrix theory is applied in order to investigate above-threshold ionization (ATI) and high-order harmonic generation (HHG) for diatomic molecules. By analyzing the HHG and ATI spectra for different orientations of molecular axis with respect to the direction of the laser polarization vector we have observed interference structures. The positions of the interference minima depend on the internuclear distance and on the relative contributions of the atomic orbitals in the linear combination of the atomic orbitals of the highest occupied molecular orbitals. The HHG and ATI spectra have been obtained for infrared laser wavelengths and linearly polarized laser field. The calculated results may also provide additional information about the molecular structure .
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