Attosecond transient-absorption spectroscopy on aligned molecules

Abstract

We discuss the characteristics of the dependence of attosecond transient-absorption spectra on the angle between the molecular alignment axis and the polarization of the pump and probe fields. We show how the dipole couplings and therefore the spectra can efficiently be controlled by exploiting the sensitivity of the transition dipoles on this relative orientation. The possibility to tune the dipole coupling by molecular alignment allows a detailed analysis of the complex structures of molecular attosecond transient-absorption spectra.