Universality of open microcavities for strong light-matter coupling

An optical resonator is utilized to enhance interactions between photons and solid-state emitters. In particular, when the coupling strength between the exciton within the material is faster than the dissipation rate, the eigenstates of the system are mixed light-matter quasiparticles referred to as exciton-polaritons. In this work, we demonstrate an open, planar cavity platform for investigating a strong coupling regime. The open cavity approach supports ease of integration of diverse material systems and in situ tunability of the photonic resonance. We characterize the strong coupling regime in systems ranging from thin 2D semiconductors, perovskites, and II-VI semiconductor quantum wells.