抄録
The goal of the experiment was to image the field induced charge dynamics in Magnesium Oxide (MgO) poly-crystals in the regime of non-perturbative high-order harmonic generation using femtosecond X-ray powder diffraction. We employ asymmetric optical fields obtained from two-color fields at appropriate phase delays to pump the sample. We expect this approach to lead to an increase in the measurable time-integrated drift currents and allow us to better measure the effective changes in the X-ray diffraction intensities in several diffraction peaks. The ability to control the charge transfer process in our samples has implications for ultrafast optical switching of currents.
