期刊
ACS NANO
卷 6, 期 11, 页码 9711-9717出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn303149p
关键词
multipole order surface plasmon; nanowire dimer; conductive junction; electron energy-loss spectroscopy; finite element simulation; bonding mode; antibonding mode
We report on the experimental and the theoretical investigation of multipole surface plasmon resonances in metal nanowires conductively connected by small junctions. 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. We extend the analysis of conductively connected structures to higher order multipole modes up to third eider, Including dark modes. Our results reveal that an increase injunction 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.
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