Figure 5 | Scientific Reports

Figure 5

From: Reflective color filter with precise control of the color coordinate achieved by stacking silicon nanowire arrays onto ultrathin optical coatings

Figure 5

(a) Schematic illustration for angular response of Si NWA on beneath layer. The reflected light is classified with specular reflection and diffusive reflection. In the specular reflection, there is only one reflected angle, θr, but, the diffusive reflection has two reflected angles such as θr and φr. (b) Specular reflectance of Si NWA on Ag substrate as a function of wavelength and incident angle. The geometrical parameters of Si NWA are as follows: D = 150 nm, Λ = 1.25 μm, and H = 2 μm. The black dashed lines indicate the reflectance of Ag substrate. (c,d) Color representations of SMCF on Ag substrate and a-Si optical coating (t10). The texts in the color palette indicate the reflected angles, θr and φr. (e,f) Photographs of SMCF on Ag substrate and a-Si optical coating as a function of viewing angle. The scale bar is 5 mm.

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