Figure 2: (a) Schematic of a plasmonic waveguide system consisting of a metal-dielectric-metal (MDM) waveguide side-coupled to a periodic array of MDM stub resonators. (b) Dispersion relation of the plasmonic waveguide system of (a) calculated using FDFD (black solid line). Results are shown for a silver-air structure with nm, nm, nm. Also shown is the dispersion relation for lossless metal (red dash-dotted line) and the resonance frequency (black dashed line) ( corresponding to ). (c) Reciprocal of the group velocity of light in the plasmonic waveguide system as a function of frequency. All parameters are as in (b). (d) Magnetic field profile of the supported optical mode in the system at μm. All other parameters are as in Figure 2(b). (e) Reciprocal of versus propagation length for the plasmonic waveguide system of Figure 2(a) at μm calculated using FDFD. Results are shown for nm (upper blue curve) and nm (lower red curve) as is varied. All other parameters are as in (b).