2, Cluster of Excellence Center for Advancing Electronics Dresden, TU Dresden, Dresden, , Germany
In conjugated polymers, electronic excitations are coherently spread over the whole conjugated polymer, the individual transition dipole moments interact by dipole-dipole coupling. As this dipole-dipole coupling is a near-field effect, the interaction is limited to a small spatial region, and the participating quantum emitters cannot be addressed and probed individually. With a colloidal approach, we build a larger-scale analogue of a conjugated polymer to study coherent energy transfer. We will couple a small ensemble of quantum emitters with a plasmonic colloidal cavities  and a spatially extended hybrid plasmonic lattice mode  to study the weak and strong light matter interaction. The fluorescence enhancement (optical gain) is provided by a lattice of silver indium sulphide (AgInS) quantum dots fabricated by confinement assembly. The light annihilation (optical loss) is achieved using a gold particle lattice by soft lithography templates and directed self-assembly. By stacking of those two components, geometrical parameters can be varied, which allows to study the coherent energy transfer systematically by time-correlated scattering and reciprocal space imaging methods. Due to the scalability of both fabrication methods, we can produce substrates with areas larger than 2 cm2, which can be expanded even further. In the end, the stacked structures pave the way to a quantum simulator of the underlying conjugated polymer.
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Acknowledgement: This project was financially supported by the Volkswagen Foundation through a Freigeist Fellowship to Tobias A.F. König. The authors acknowledge the Deutsche Forschungsgemeinschaft (DFG) within the Cluster of Excellence ‘Center for Advancing Electronics Dresden’ (cfaed) for financial