907183.fig.002a
(a)
907183.fig.002b
(b)
907183.fig.002c
(c)
907183.fig.002d
(d)
Figure 2: (Color online) Transformation of [(a) and (c)] SPP energy spectrum and [(b) and (d)] damping-factor dispersion with changing absorption parameter . The SPP frequency is normalized to the plasma frequency of silver. Solid green curves show propagating modes, whereas dashed curves show complex and evanescent modes.