The contents of this thesis examine the conditions under which the probability of light-matter interactions increases inside reflective cavities. Such interactions lead to the formation of a quasi-particle known as a polariton. Previous studies have explored, in detail, the conditions under which polaritons are formed when the matter (emitter) emits at the same frequency as the energy of the cavity (that is when the system is resonant). This thesis explores the conditions of the formation of polaritons when emitters across multiple cavities do not have the same energy (that is, emitters are disordered).While such interactions have been studied with theoretical models thus far, it is likely that if polaritons are experimentally created in arrays of cavities, it will be with disordered emitters, for example in Silicon Carbide or diamond color center systems. To gain the most out of their applications, such as quantum simulators and quantum communication, it becomes prudent to study the conditions of their formation in a more realistic (disordered) setting. Since most prominent studies currently focus on resonant cases, they do not provide a complete picture of the behavior of experimentally created polaritons. In the research summarized in this dissertation, I discuss my findings about some differences between resonant and disordered systems.