These theoretical investigations on the hybridization of light and matter excited surfaces highlight the possibility for photochemistry to be controlled by tuning the coupling strength g c and the cavity frequency ω c . However, the investigations in Fig. only involved a single molecule coupled to a single mode with idealized model potentials inside a lossless cavity. These simplifications merit further investigation into simulations of more realistic polaritonic systems. In particular, there exist several other factors that play significant roles in the ability to control photochemistry, which will be elaborated upon in the following sub-sections. The collective coupling effect will be extensively discussed in Sec. 6. On the other hand, the theoretical investigations presented in this section might be able to be carried out in actual experimental investigations using a plasmonic cavity setup.