Figure 5. Equivalent refractive index coefficients derived from the dispersion of the mediated SSPP and the phase difference between the x- and y-polarized components.

(a) The equivalent refractive index coefficients for x- and y-polarized wave normal incidence. (b) The phase difference between the transmissions for y- and x-polarized wave incidence calculated from the derived refractive index coefficients n_y and n_x.