Rui Guo, M. Decker, F. Setzpfandt, I. Staude, D. Neshev, Y. Kivshar
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Fano nanoantenna for on-chip separation of wavelength-encoded optical signals
We demonstrate a single plasmonic element Fano nanoantenna allowing for strong directional coupling of light to a silicon waveguide depending on the operational wavelength. This antenna can spatially separate wavelength-encoded optical signals, realizing an ultra-compact plasmonic demultiplexer.