Dynamical Theory of Artificial Optical Magnetism Produced by Rings of Plasmonic Nanoparticles

Details Dynamical Theory of Artificial Optical Magnetism Produced by Rings of Plasmonic Nanoparticles Dynamical Theory of Artificial Optical Magnetism Produced by Rings of Plasmonic Nanoparticles

2008-05-15

arxiv.org/abs/0805.2329v1

Physics

Condensed Matter

Materials Science

34 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.085112

We present a detailed analytical theory for the plasmonic nanoring configuration first proposed in [A. Alu, A. Salandrino, N. Engheta, Opt. Expr. 14, 1557 (2006)], which is shown to provide negative magnetic permeability and negative index of refraction at infrared and optical frequencies. We show analytically how the nanoring configuration may provide superior performance when compared to some other solutions for optical negative index materials, offering a more 'pure' magnetic response at these high frequencies, which is necessary for lowering the effects of radiation losses and absorption. Sensitivity to losses and the bandwidth of operation of this magnetic inclusion are also investigated in details and compared with other available setups.

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