Observation of ultra-large Rabi splitting in the plasmon-exciton polaritons at room temperature

Abstract Modifying the light–matter interactions in plasmonic structures and two-dimensional (2D) materials not only advances deeper understanding of fundamental studies many-body physics but also provides opportunities for exploration novel 2D polaritonic devices. Here, we report plasmon-exciton coupling hybrid system with a metasurface which can confine electric field an extremely compact mode volume. Because feature designed fabricated Al metasurface, confined electronic is distributed plane same orientation as that exciton dipole moment transition metal dichalcogenides monolayers. By finely tuning geometric size nanostructures, significantly modify dispersion relation coupled plasmon exciton. Our shows strong behavior achieved Rabi splitting up to ∼200 meV at room temperature, ambient conditions. The effective tailoring metasurfaces testing platform studying quantum electromagnetics subwavelength scale well exploring polariton Bose–Einstein condensation temperature.