Figure 6
Effect of average Bragg PG refractive index \(\bar{n}\): (a) Simulated angular response and (b) corresponding edges for two-slant design optimized for \(\bar{n}=1.9\) (blue curve and dots). The other colors (red, gold, purple, and green) correspond to lower values of \(\bar{n}\) (1.8, 1.72, 1.65, and 1.6), respectively. Simulation parameters are otherwise the same as Fig. 2(a).
