Coupling quantum emitters to the optical modes of a photonic lattice creates new opportunities for engineering exotic quantum light sources and developing novel quantum simulators with long-range interactions. It would allow studying non-classical states with spread entanglement and the implementation of strongly correlated phases of light. The main goal of this internship is to experimentally study the optical properties of quantum emitters coupled to a lattice of We have recently implemented an open cavity system with embedded individual molecules of DBT. Each molecule is a two-level system whose excitation couples to light. The internship will consist in the characterization of the open cavity with quantum emitters and the study of superradiance and subradiance effects, which have never been observed in the context of lattice dynamics.