Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 20: Nano-optics of metallic and semiconducting nanostructures (time resolved)
O 20.8: Vortrag
Dienstag, 24. März 2009, 12:15–12:30, SCH A216
Surface plasmon polariton - exciton interaction in semiconductor-metal hybrids and dye-metal systems — •Stephan Schwieger1, Parinda Vasa2, Christoph Lienau2, and Erich Runge1 — 1Technische Universität Ilmenau, 98693 Ilmenau, Germany — 2Carl von Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany
Surface plasmons polaritons (SPPs) are optical excitations that are confined to a metal surface and coupled to far-field radiation, e.g., by a periodic nanowire array. The interaction of SPPs and excitons in semiconductor quantum wells (QW) [P. Vasa et. al., PRL, 101, 116801 (2008)] or in a dye layer is investigated. The coupling strength is estimated for different systems and band structures of the coupled modes are calculated. A band gap at the exciton resonance energy is found for the dye system, which indicates strong coupling energies. In the semiconductor system, we predict an efficient energy transfer from excitons to SPPs and a clear enhancement of the SPP life time and propagation length for optimized parameters.