科研之友
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摘要
The adiabatic strong-field approximation is used to study ionization yields as a function of the angle between the polarization of the external field and molecular axis for CO2, CO, and OCS molecules. We find that orbital distortion plays an important role in explaining positions and relative strengths of extrema in the yields for both polar and nonpolar molecules, even for molecules with low polarizabilities and at low laser intensities. In particular, we show that for CO2 the maximum in the ionization yield shifts towards the experimentally measured maximum when accounting for orbital distortion. For the CO molecule, not only is the preferred direction of ionization correctly predicted by the theory, but also the ratio between yields for orientations with the electric field pointing towards C and O ends, respectively. For OCS we find that ionization is more probable when the laser field points from the O end towards the S end than when the field points in the opposite direction.
- 出版日期2015-4-10
