Recent theoretical works have examined the effects of coupling the ground-excited transition of photo-dissociation reactions to optical cavities. Fig. illustrates the typical molecular ground and excited surfaces present in photodissociation reactions which are composed of covalent and ionic bond characters. A key feature of these surfaces is that they become nearly degenerate at some finite nuclear distance away from the equilibrium bond configuration. Additionally, some nuclear configurations have larger gaps between the excited and ground surfaces (pink arrow) than other configurations (green arrow). Tuning the cavity frequency to match these energy gaps will create a cavity-induced avoided crossing at that respective nuclear configuration, which will generally be closer to the equilibrium bond con- This causes the upper polariton surface (red curve in Fig. ) to have a broad well shape that resists dissociation, and the lower polariton surface (blue curve in Fig. ) to have a potential well centered around the equilibrium bond configuration. Upon Franck-Condon photoexcitation and with large Rabi splittings, the curvatures of these surfaces encourage the nuclear wavepacket to stay near the equilibrium bond configuration until the excitation eventually relaxes to the molecule ground state through loss channels. Fig. shows molecular ground state population dynamics of the dissociation reaction of a NaI molecule coupled to an optical cavity, as illustrated in panels a-c. With (i) no coupling or (ii) weak light-matter coupling, a large portion of the nuclear wavepacket moves towards ioniccovalent avoided crossing, transfers to the flat part of the covalent curve, and dissociates readily. With (iii) a stronger light-matter coupling, the nuclear wavepacket becomes trapped in the wells of the upper polariton state (red surface shown in panel c), resulting in an oscillatory covalent character and less dissociation since the original ionic-covalent avoided crossing and energetic plateau is not reached by the wave packet.