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Highly Efficient Surface Plasmon Launching and Decoupling
Last modified: 2011-12-14
Abstract
We report on the design and experimental observation of a highly efficient unidirectional surface plasmon polariton (SPP) launcher composed of eleven grooves, each with distinct depths and widths. We show that under normal illumination by a focused Gaussian beam, unidirectional SPP launching with an efficiency of at least 52% is achieved experimentally with a compact antenna. Reciprocally, we report that the same device can efficiently convert SPPs into a highly directive light beam emanating perpendicularly to the sample.
Keywords
plasmonics, nanophotonics, unidirectional launcher and decoupler, plasmonic nanoantenna,