Figure 4
From: Design of a structure with low incident and viewing angle dependence inspired by Morpho butterflies
Contour plot showing reflections versus wavelength and viewing angle (β) of a tree-like structure.
(a), (b) and (c) incident angles α = 0°, 30° and 60°, respectively, under s polarization; (d), (e) and (f) incident angles α = 0°, 30° and 60°, respectively, under p polarization; “k” is the diffraction order (the color-coded intensities correspond to a logarithmic scale).
