We present theoretically the formation of exciton–photon polaritons and exciton-surface plasmon polaritons in a perovskite-based subwavelength lattice on the metallic plane. It is shown that the later polaritons will be achieved as the perovskite layer is ultra-thin (
Leran Lu, Quynh Le-Van, Lydie Ferrier, Emmanuel Drouard, Christian Seassal, Hai Son Nguyen. Engineering a light–matter strong coupling regime in perovskite-based plasmonic metasurface: quasi-bound state in the continuum and exceptional points[J]. Photonics Research, 2020, 8(12): A91