Moritz Esslinger, Worawut Khunsin, Nahid Talebi, Tongda Wei, Jens Dorfmüller, Ralf Vogelgesang and Klaus Kern Phase Engineering of Subwavelength Unidirectional Plasmon Launchers Advanced Optical Materials 1
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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