Analysis of Plasmonic Waveguides and Gratings Using Implicit Finite-Difference Methods

Figure 5

Normalized transmission coefficient.

(a) Comparison between concave type (Figure 4(a)) and convex type (Figure 4(b))

(b) Comparison between concave type (Figure 4(a)) and flat-concave type (Figure 4(c))

(c) Comparison between convex type (Figure 4(b)) and flat-convex type (Figure 4(d))