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Abstract
Two-dimensional (2D) semiconducting microcavity, where exciton-polaritons can be formed, constitues a promising setup for exploring and manipulating various regimes of light-matter interaction. Here, the coupling between 2D excitons and metallic cavity photons is studied by using first-principles propagator technique. The strength of exciton-photon coupling is characterised by its Rabi splitting to two exciton-polaritons, which can be tuned by cavity thickness. Maximum splitting of 128 meV is achieved in phosporene cavity, while remarkable value of about 440 meV is predicted in monolayer hBN device. The obtained Rabi splittings in WS$_2$ microcavity are in excellent agreement with the recent experiments. Present methodology can aid in predicting and proposing potential setups for trapping robust 2D exciton-polariton condensates.
Highlights
The interplay between cavity photons and matter can result in the formation of hybrid polarization-photon modes, commonly called polaritons [1]
Due to their dual light-matter nature, these bosonic quasiparticles are enriched with exceptional physical properties, such as small effective mass and nonlinearity, absent in the matter outside the optical cavity
The first 2D exciton polaritons were realized in a monolayer of transition metal dichalcogenide (TMD) MoS2, where Rabi splitting between the exciton and a cavity photon of ∼50 meV was observed [25]
Summary
The interplay between cavity photons and matter can result in the formation of hybrid polarization-photon modes, commonly called polaritons [1]. The first 2D exciton polaritons were realized in a monolayer of transition metal dichalcogenide (TMD) MoS2, where Rabi splitting between the exciton and a cavity photon of ∼50 meV was observed [25].
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