title: Circular dichroism in laser-assisted short-pulse photoionization.
abstract: A remarkable effect of circular dichroism, i.e., a difference in photoelectron spectra produced by right and left circularly polarized light in two-color multiphoton ionization of atoms, is predicted for the case when the atom is ionized by an extreme ultraviolet or x-ray femtosecond pulse in the field of a strong infrared laser pulse, both pulses being circularly polarized. We show that the sidebands formed in the spectra exhibit different circular dichroism often of different signs both in angle-resolved and angle-integrated experimental conditions. The effect can be used for detecting and measuring circular polarization of x rays in a spectral range where other methods are not effective.
authors.affiliation: Departamento de Fisica de Materiales, UPV/EHU, E-20018 San Sebastian/Donostia, Spain.
authors.forename: A K
authors.initials: AK
authors.lastname: Kazansky
authors.forename: A V
authors.initials: AV
authors.lastname: Grigorieva
authors.forename: N M
authors.initials: NM
authors.lastname: Kabachnik