Radiation direction control by optical slot antenna integrated with plasmonic waveguide
2016
We present an optical slot antenna integrated with a metal-dielectric-metal (MIM) plasmonic waveguide. By integrating
optical slot antenna on top metal layer of MIM waveguide, we can couple the plasmon guide mode into the feed antenna
directly. The resonantly excited slot antenna works as a magnetic dipole and then radiates in dipole-like far-field pattern.
By adding an auxiliary groove structure along with the slot antenna, the radiation can be directed into the direction where
the structure determined. The demonstrated optical slot antenna integrated with a plasmonic waveguide can be used as a
“plasmonic via” in plasmonic nanocircuits.
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