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A slot plasmonic waveguide is promising solution as a replacement of electrical interconnects in the future optical integrated circuits. In this contribution we consider a set of compact solutions for coupling the infrared light from free space to the plasmonic slot waveguide. We systematically study various designs: dipole antennas outside the waveguide, antennas inside the waveguide and bow-tie antennas in the slots.

Plasmonics; couplers; nanophotonics