Utilizing light-matter re-coupling to enhance and control the superfluorescence in a semiconductor overdamped ring microcavity

In this paper, we study the propagation and time-evolution behavior of superfluorescence in an overdamped semiconductor ring microcavity. By introducing a re-coupling mechanism between the unidirectionally propagating superfluorescence and the cooperative exciton state with a specified Gaussian spatial distribution, we can compress the width of the photoluminescence (PL) pulse in both temporal and spatial scales. Using realistic parameters from perovskite superlattice materials, we observe that the maximum intensity increases twofold compared to the ordinary radiation behavior observed in planar microcavity systems. This offers an alternative approach to achieving the desired PL. By controlling the excitation density distribution, the dissipation rate, and the length of the ring cavity, we can manipulate the spatial position and the corresponding temporal evolution of the PL pulse at micrometer and picosecond scales, which holds significant potential for various applications.