Figure 7
From: In the quest of lossless slow light at surface plasmons
Trajectories of optimal designs from Fig. 6a along the planes of surface plasmons quality, as the operational wavelength is being swept across the entire visible spectrum \(400~\textrm{nm}<\lambda <700~\textrm{nm}\). Bilayers from Table 1 on maps with vertical axes representing the enhancement metric Q and horizontal axis measuring: (a) the plasmon wavenumber \(\textrm{Re}[\beta /k_0]\) and (b) the loss tangent \(\tan \delta\). The optimal operational points are denoted by circular markers.
