Strong coupling of exciton and guided mode in perovskite film with high fabrication-tolerant scheme

Abstract

The strong coupling between guided mode resonance of dielectric grating and excitons in perovskite film is theoretically investigated. It is numerically demonstrated that the strong coupling between guided mode resonance and excitons can enable a significant Rabi splitting. The maximum Rabi splitting up to 362 meV can be achieved through changing the period of the dielectric grating, which is also confirmed theoretically through the coupled-oscillator model. In addition, the effects of the structure dimensions on the strong coupling are also studied in detail, so as to provide theoretical guidance for real fabrication. More importantly, the Rabi splitting could be further enlarged even up to 378 meV by increasing the thickness of the perovskite film. Our findings provide a novel scheme for realizing perovskite-based light-matter interactions and enable related studies on quantum and nonlinear photonic devices.