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Appl Opt. 2011 Oct 1;50(28):5457-64. doi: 10.1364/AO.50.005457.

Ring-type plasmon resonance in metallic nanoshells.

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  • 1Department of Electrical Engineering, Holon Institute of Technology, Holon, Israel.


A simple, approximate theoretical model of surface plasmon resonance in two-dimensional metal nanoshells is developed. The model is based on the concept of short-range surface plasmons propagating around closed circular metal nanotubes. In this model, the plasmon resonance in a metal nanotube is treated as a propagating, self-interfering plasmonic wave, in a ring-type resonance, at plasmonic wavelengths matching an integer fraction of the nanotube's effective circumference. The model is validated by detailed computer simulations based on the finite-difference time-domain method and is shown to be in full agreement with the widely used plasmon hybridization model, which is based on the quasi-static approximation.

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