A hybrid coupler composed of a slot plasmonic waveguide and a dielectric waveguide is proposed and its coupling
characteristics are analyzed. The simulation results show that the ultra-small mode of the slot plasmonic waveguide can
be excited efficiently by the dielectric waveguide mode within the coupling length of just several microns, which
provides an interface between the slot plasmonic devices and dielectric devices. Meanwhile, based on this hybrid the
coupler, a highly integrated refractive index sensor could be realized.
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