Molecules are initially in the ground electronic state occupying the ground ro-vibrational state. The process starts when molecules are subjected to a low intensity CW that drives the ground ro-vibrational state into the dissociative potential as schematically depicted in Fig. . The range of transition frequencies corresponding to such a transition are defined by the Frank-Condon (FC) factor (14) The FC distribution for the numerical parameters used is shown in Fig. . This makes it simple to find a desired resonant cavity (here chosen to match the maximum of the FC distribution) by adjusting mirror-tomirror distance. The results of simulations combining the cavity and molecules are shown in Fig. that shows the transmission through an empty cavity and a cavity containing the molecular slab for several values of the number density, . The observed Rabi splitting indicates that the system is in the strong