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Efficient coupling to metal-dielectric-metal plasmonic waveguides with subwavelength slit structures

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Abstract

We introduce compact micron-scale slit structures for incoupling free space light into subwavelength metal-dielectric-metal plasmonic waveguides. An optimized two-slit coupler leads to ~3.3 transmission enhancement compared to the optimized single-slit coupler.

© 2012 Optical Society of America

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