We report on the experimental and the theoretical investigation of multipole surface plasmon resonances in metal nanowires conductively connected by small junctions. ![]() Multipole Surface Plasmon Resonances in Conductively Coupled Metal Nanowire Dimers Item Type:Īlber, Ina Sigle, Wilfried Demming-Janssen, Frank Neumann, Reinhard Trautmann, Christina Aken, Peter A. Our results reveal that an increase in junction size does not shift significantly the antibonding modes, but causes a strong blue shift of the bonding modes, leading to an energetic rearrangement of the modes compared to those of a capacitively coupled dimer with similar dimensions. We extend the analysis of conductively connected structures to higher order multipole modes up to third order, including dark modes. ![]() The influence of a conductive junction on the resonance energies of nanowire dimers was simulated using the finite element method based software CST Microwave Studio and experimentally measured by electron energy-loss spectroscopy in a transmission electron microscope. ![]()
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