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Enhancement of extraction efficiency in nanoimprinted optical device structures

We demonstrate strong enhancements in the spontaneous emission intensity of emitters embedded in a printable polymer by coupling excitons to surface plasmon polaritons of metallic thin films or to localized surface plasmons of metallic nanoparticles. The nanocomposite materials are patterned by nanoimprint lithography with photonic crystal to enhance the light extraction of the polymer films. We finally show how NIL can be used to pattern metallic electrodes containing photonic crystals to couple the light-out of the plane and to pattern metallic electrodes containing plasmonic crystals showing extraordinary transmission to realize ITO-free OLEDs.