Next, Fig. shows the probability flux in the excited electronic state as a function of time at three driving frequencies: lower polariton (black), central transition frequency (red), and the upper polariton (blue). Calculations are performed at a.u which is reached by the excited nuclear wavepacket after over 100 fs. We clearly see that the probability flux exhibits noticeably different rise times, which depend on the driving frequency. When this frequency is resonant with the bare molecular transition frequency (red line in Fig. ), the wavefunction develops a large wavefront at early times, which moves to larger distances (as seen in Fig. which is also calculated for the molecular transition frequency). The flux peaks at about