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Observation of electrically generated polaron-polaritons in a monolayer MoSe2 microcavity.

Quasiparticles arising from the interaction between mobile impurities and a quantum many-body environment-known as polarons-play a pivotal role in shaping the optical and electronic properties of low-dimensional systems. Here, we report the direct observation of electrically generated polaron-polaritons within a monolayer molybdenum diselenide microcavity. By embedding the monolayer in a planar optical cavity, we achieve strong coupling between exciton-polarons and cavity photons, creating an electrically driven light-emitting diode based on polaron-polaritons. The device exhibits an external …