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Giant enhancement of electric field between two close metallic grains due to plasmonic resonance

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Abstract

We theoretically examine plasmonic resonance between two close metallic grains separated by a gap of width much less than the length of the incident electromagnetic wave. Resonance conditions are established and the electric field enhancement is found. Our general arguments are confirmed by analytic solution of the problem for simplest geometries. We discuss an extension of our results to more complex cases.

© 2010 Optical Society of America

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