In-plane plasmonic modes in a quasicrystalline array of metal nanoparticles

Details In-plane plasmonic modes in a quasicrystalline array of metal nanoparticles In-plane plasmonic modes in a quasicrystalline array of metal nanoparticles

2010-12-12

arxiv.org/abs/1012.2526v1

Physics

Optics

20 pages, 4 figures

Scientific paper

We investigated the plasmonic modes in a two-dimensional quasicrystalline array of metal nanoparticles. The polarization of the modes is in the array plane. A simplified eigen-decomposition method is presented with the help of rotational symmetry. Two kinds of anti-phase ring modes with radial and tangential polarizations are of highest spatial localizations among all of plasmonic modes. For the leaky characteristic of the anti-phase ring modes, the highest fidelity mode is found to be tangential polarized mode in the quasicrystal array, whereas normal-to-plane polarized mode in the solo ring. The leaky characteristics and spatial localizations of other plasmonic modes are also studied, for example, collective vortex mode that may be potentially useful to form negative responses in plasmonic device, and collective radial mode that may be used to generate light sources with radial polarizations.

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