CST – Computer Simulation Technology

Plasmon hybridization in stacked metallic nanocups
LarissaWollet, Bettina Frank, Martin Sch¨aferling, Martin Mesch, Sven Hein, Harald Giessen
Optical Materials EXPRESS
Volume: 2, Issue: 10, 1 October 2012
Plasmon hybridization in stacked
We investigate hybridized electric and magnetic plasmon modes in stacked nanocups. To elucidate the coupling mechanism we demonstrate the analogy between split-ring-resonators and nanocups in the case of dipolar excitation and compare the behavior of stacked nanocups to stacked split-ring-resonators. The interplay of electric coupling with the symmetric and antisymmetric coupling of magnetic moments in effective split-ring-resonator resonances in the nanocups leads to experimentally observed hybridized modes in the coupled nanocup system. Our stacked nanocups are easily manufacturable at low cost, they cover a large-area, and can serve as SERS or SEIRA substrates. They might also serve as novel plasmonic nanoantennas, as templates for nonlinear plasmonics, and as stacked meander surfaces for metamaterial-assisted imaging.

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