Abstract
An optical organic semiconductor microcavity showing the strong coupling regime was prepared. The dye 1,1 ′-diethyl-2,2 ′-cyanine (PIC) forming J-aggregates was used as optically active material in a planar λ/2-microcavity configuration. Stable thin layers of homogeneously distributed aggregates without any matrix were prepared by spin-coating of a specific salt of the dye [(PIC +) 2B 10H 10 2−]. Strong exciton–photon coupling was demonstrated by the anticrossing of exciton and photon modes. A Rabi-splitting of more than 50 meV was observed in transmission measurements. The asymmetric normal mode splitting could be explained by the asymmetric absorption spectrum of the J-aggregate.
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