Figure 3
Dispersion curve for silver-based MDN and map of electromagnetic modes. (a) The dispersion curve for silver-based MDN at ωp = 1.39·1016 s−1, g = 0.1 and ϵd = 3.42 (blue line). The light line ω=ck is also shown. (b) Map of the electromagnetic modes in the g-ω plane. SPP and BPP exist in gray and hatched areas, respectively.