Figure 3
From: In the quest of lossless slow light at surface plasmons
Representation of all the optimal designs from Tables 1 and 2 across planes of the constituent characteristics of the two media. Each marker is painted in the color of visible light at which optimal operation is achieved. (a) Bilayers of Table 1 across \((\textrm{Re}[\varepsilon _1],\textrm{Re}[\varepsilon _2])\) map, (b) bilayers of Table 1 across \((\textrm{Im}[\varepsilon _1],\textrm{Im}[\varepsilon _2])\) map, (c) bilayers of Table 2 across \((\textrm{Re}[\varepsilon _1],\textrm{Re}[\varepsilon _2])\) map, (d) bilayers of Table 2 across \((\textrm{Im}[\varepsilon _1],\textrm{Im}[\varepsilon _2])\) map.
