An article of our researchers was published in the journal Nature Communications, where the modification of material properties due to the strong binding of light to matter was experimentally studied and an effective inversion of exciton bands in a WSe2 monolayer with a spin-forbidden dark ground state was demonstrated. In experiments, using strong coupling between a cavity photon and a high-energy bright spin-allowed exciton, two bright polariton modes were created in the optical band gap with the lower mode below the dark state of WSe2. It has been demonstrated that luminescence quenching associated with rapid relaxation to the dark ground state is prevented in this mode, which leads to brightening of this initially dark material
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