“…[2,3] Otherwise, the system stays in the weak coupling regime in which the emitter and cavity lifetimes are modified by each other, resulting in cavity-enhanced or cavity-prohibited spontaneous emission, known as the Purcell effect. [4,5] Microcavities play a significant role in a wide range of research areas including light-matter interaction, [2] nonlinear optics, [6] quantum information, [7] and topological photonics, [8,9] serving as crucial elements of on-chip microlasers, [10] optical switches, [11] isolators, [12,13] sensors, [14] photonic logic gates, [15] quantum simulators, [16,17] and high-efficiency quantum light sources. [18] The main advantage of the microcavities over the macroscopic cavities is the small mode volume that is a necessity for enhancing light-matter interaction.…”