Numerical study of guided modes in arrays of metallic nanowires

Abstract

We numerically investigate the band structure and guided modes within arrays of metallic nanowires. We show that bandgaps appear for a range of array geometries and that these can be used to guide light in these structures. Values of attenuation as low as $1.7\mathrm{dB}∕\mathrm{cm}$ are predicted for arrays of silver wires at communications wavelengths. This is more than 100 times smaller than the attenuation of the surface plasmon polariton modes on a single silver nanowire.

© 2007 Optical Society of America

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