Tunable coupling of a hybrid plasmonic waveguide consisting of two identical dielectric cylinders and a silver film
(color online) (a) Hybrid effective index varies with the radius of the cylinders for different HPWs. (b) The propagation length as a function of the radius of the cylinders for different HPWs. The black line denotes the hybrid effective index of the cylinder mode, and other colored lines mean the hybrid effective index of the hybrid mode in CHPWs with different h.
