Strong Coupling in a Microcavity LED

Abstract

Thin films of polyelectrolyte$/J$ aggregate dye bilayers with high absorption coefficient (6 nm thick with $\ensuremath{\alpha}\ensuremath{\approx}1.0\ifmmode\times\else\texttimes\fi{}{10}^{6}\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$) inserted in an optical microcavity enable the cavity quantum electrodynamic strong coupling limit to be reached at room temperature with a coupling strength (Rabi splitting) of $265\ifmmode\pm\else\textpm\fi{}15\text{ }\text{ }\mathrm{meV}$. By embedding these films in a resonant cavity organic LED structure, we demonstrate the first emissive electrically pumped exciton-polariton device.