Femtosecond dynamics of stepwise two-photon ionization in solutions as revealed by pump–repump–probe detection with a burst mode of photoexcitation

Pump-repump-probe spectroscopy with a burst mode of photoexcitation was applied to the direct observation of the photoionization dynamics of perylene in the solution phase. Irradiation of a pump pulse train generated with birefringent crystals effectively accumulated an intermediate S