Selective optical-optical switching for planar plasmonic waveguides and nodes
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Michael C Quong1, Abdulhakem Y Elezzabi
1Ultrafast Optics and Nanophotonics Laboratory, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada. mquong@ualberta.ca
Abstract:
Two nodes are studied as means to perform selective optical-optical switching of four planar thin surface plasmon waveguides by interfering TEM(10), TEM(01), and TEM(00) light beams incident upon a node. One node uses a flat-apex pyramidal reflector to reflect the incident light toward the waveguides' ends. An alternative node is a simple square aperture, which couples surface plasmons through light diffraction at the aperture's edges. Numerical calculations predict switching contrast, coupling efficiencies, and cross-talk between waveguides. Individually turned-off waveguides are shown to have their coupled surface plasmons attenuated by at least -10 dB and up to -21 dB.
