Moving to the time-domain, we can use both RT-TDHF and TDCIS methods to propagate the electrons in the presence of an applied field. For RT-TDHF, the linear absorption spectra of the three systems perturbed with a δ-pulse shows peaks at expected positions, corresponding to energies calculated with the linear response methods. To force the evolving TDHF electronic structure away from the regime where the adiabatic approximation holds, the molecules are significantly perturbed from their initial ground states using applied fields with the field-frequencies resonant with the linear response S 0 → S 1 transitions. We first excite the systems using a continuous field with frequency resonant with the S 0 → S 1 transition for each molecule to induce Rabi-like oscillations, and then later examine population and peak shifting trends with finite-time applied fields.