Nanoscale Plasmonic Devices Based on Metal-Dielectric-Metal Stub Resonators

Figure 3

(a) Schematic of a plasmonic waveguide system consisting of a periodic array of two MDM stub resonators side-coupled to a MDM waveguide. (b) Dispersion relation of the plasmonic waveguide system of Figure 2(a) calculated using FDFD (red dashed line). Results are shown for a silver-air structure with 𝑑=300 nm, 𝐿₁=360 nm, 𝐿₂=160 nm, and 𝑤=50 nm. Also shown is the dispersion relation for lossless metal (black solid line). (c) Magnetic field profile for the structure of (a) for 𝐿₁=360 nm, 𝐿₂=160 nm, 𝑤=50 nm at 𝑓=194 THz.

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