Black Beauties- Super Black Butterfly Scales Alison Sutton Fernandes 0225014 Why Butterflies? Butterflies have irridescent colours formed by photonic crystals. But what about the intense black areas on the wings? Wing scales with very low reflectance (>0.5%)
Alison Sutton Fernandes
R= ((nt-ni)/(nt+ni))2 = ((1-1.56)/(1+1.56))2
Spectral information from single scales.
Moth eyes (Hutley et al):
A similar type of structure is used to absorb sound wave in recording rooms without creating interference through reflections.
Thin films also attempt this method, by layering films of slightly decreased refractive index to lower surface reflections.