META Conference, META'12

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Highly Efficient Surface Plasmon Launching and Decoupling
Alexandre Baron, Eloïse Devaux, Jean-Claude Rodier, Jean-Paul Hugonin, Emmanuel Rousseau, Cyriaque Genet, Thomas W Ebbesen, Philippe Lalanne

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,