Phase Engineering of Subwavelength Unidirectional Plasmon Launchers

Authors


E-mail: m.esslinger@fkf.mpg.de, r.vogelgesang@nanoopt.org

Abstract

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Ultrasmall couplers for the excitation of plasmonic structures by photonic modes are presented. They are constructed by assembling point-like resonators in the near-field zone of the target structure. As a demonstration of its efficacy, this scheme is applied to unidirectional excitation of plasmonic waveguides. The overall footprint of the resulting coupling structures is less than λ2/10.

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