Figure 7: 2D and 1D electric field profiles of guided low-loss plasmonic modes for MIM type and IMI type HDLNRPWs.

(a)–(c) MIM type hybrid waveguide, whose geometric parameters were w = h = 200 nm, r = 20 nm, and g = 5 nm; (d)–(f) IMI type hybrid waveguide with structural parameters as: w = h = wm = 200 nm, tm = 15 nm, r = 20 nm, and g = 5 nm.