Abstract
The antenna-mediated coupling of light into Ag nanowire is investigated both in experiments and simulations. The coupling efficiency is strongly depended on the architecture of the metallic particles related to the Ag nanowire. Different incident angles of excitation laser are also tested for the maximum coupling effiecieny. The results demonstrate three-arm triangle antenna group fabricated at the incident end can effectively enhance the surface plasmon polariton (SPP) coupling and propagation. The SPP resonance and the Fabry-Perot cavity theory are used to explain the plasmon enhancement and propagation phenomena. The suggested structure can be served as an enhanced plasmonic waveguide for the nanophotonic and plasmonic circuits in the future.
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