Polaritons in organic solids

"Organic polaritons" form in semiconductor microcavities with dielectric top and bottom mirrors and an active organic semiconductor layer when confined photons and vibrational excitations strongly interact with each other inducing a steady energy transfer between both particles. Such an organic microcavity can provide very high coupling strengths and polariton stability up to room temperature and far above. This is the result of the very high exciton binding energy in organic solids which is based on the strong localization of vibrational excitations (so called Frenkel excitons).
Our current research comprises the identification of suitable organic semiconductors and inorganic mirrors for polariton formation and room-temperature condensation. We are further working on correlation measurements of optically and electrically induced Frenkel-exciton polaritons.

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