Control of Polaritonic Coupler Using Optical Stark Effect in 2D Hybrid Organic-Inorganic Perovskite Microcavity

This research delves into the innovative application of the optical Stark effect in dynamically guiding polaritons through a Y-shaped potential, forming a polaritonic coupler within a 2D hybrid organic-inorganic perovskite microcavity. The study explores the characteristics of the 2D perovskite, focusing on harnessing the optical Stark-induced energy shift in the polariton branches. The polaritonic coupler, which has a single input and two divergent outputs, is subjected to an external optical Stark pulse, dynamically guiding polaritons between the input and outputs. The research focuses on examining the controllability of the polaritonic coupler through the polariton coupling ratio, highlighting the regulatory role played by the optical Stark effect in this dynamic process. In-depth analyses of the spatial distribution and time evolution of polaritons within the coupler reveal that the optical Stark pulse effectively regulates the polariton coupling ratio, realizing a programmable coupler. This investigation not only advances the fundamental understanding of polariton dynamics within 2D hybrid organic-inorganic perovskite microcavities but also demonstrates the potential for developing optically controlled integrated photonic devices.