Compact dipole nanoantenna coupler to plasmonic slot waveguide

Andrei Andryieuski, Radu Malureanu, Giulio Biagi, Tobias Holmgaard, Andrei Lavrinenko
2012 Optics Letters  
Optical nanoantennas can be used for coupling radiation to or from waveguides in analogy to micro-and radio-wave systems. In this letter we provide a systematic description of the design approaches for a coupler to a plasmonic slot waveguide in the telecom range around 1.55 μm with realistic excitation from a lensed optical fiber. We show that the best coupling efficiency of 26% can be achieved by utilizing a dipole antenna with side and bottom reflectors, and such coupling efficiency is 185
more » ... es larger than for the bare waveguide. The nanoantenna coupler provides a compact interface between an optical fiber and a plasmonic slot waveguide for future optical integrated circuits.
doi:10.1364/ol.37.001124 pmid:22446246 fatcat:c4nqsjvbere7db7552gv2tzrkm