Fig. 4: Angle dependence of FROCs.
From: Fano resonant optical coatings platform for full gamut and high purity structural colors
a Swatch array of a silica capped FROC for a constant optical length by varying the refractive index and incidence angle. The angle dependence can be controlled by the refractive index of the dielectric cavity. b, c Show a swatch array as a function of the cavity thickness and incidence angle for a FROC with real dispersive materials TiO2 \(\left(n \sim 2.3\right)\) and LiF \((n \sim 1.4)\) as the dielectric cavity material.
