Optimized White Reflectance in Photonic‐Network Structures

Abstract 3D disordered networks are receiving increasing attention as they represent a versatile architecture for highly scattering materials. However, due to their complex morphology, little is known about the interplay between their structural and optical properties. A simple algorithm that allows for the generation of photonic‐network structures inspired by that of the Cyphochilus beetle, famous for the bright‐white reflectance of its thin cuticular scales, is described. This model allows the degree of structural anisotropy and filling fraction of the network to be varied independently, revealing the key contribution of these two parameters to the overall scattering efficiency. Rigorous numerical simulations show that structures obtained with the use of this algorithm can exceed the broadband reflectance of the beetle while using less material, providing new insight into the design of advanced scattering materials.