title: Design of a structure with low incident and viewing angle dependence inspired by Morpho butterflies.
abstract: Morpho butterflies are well known for their brilliant iridescent colors, which arise from periodic arrays of scales. These brilliant colors have a low angle dependence, in contrast to similar phenomena that are commonly caused by the periodic structures. We designed a structure with a low incident and viewing angle dependence inspired by Morpho butterflies. This structure was studied using the finite-difference time-domain method. The lamellae distribution of tree-like structure was found to be the determining factor for producing a low incident angle dependence. Two advanced models were designed to produce a low viewing angle dependence. Model I was constructed using two layers of scales. The particle swarm optimization algorithm was used to construct Model II. The angle dependence of Model II exhibited a large viewing angle range under various incident angles.
authors.affiliation: State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University 800 Dongchuan Road, Shanghai, P. R. China.
authors.forename: Wanlin
authors.initials: W
authors.lastname: Wang
authors.forename: Wang
authors.initials: W
authors.lastname: Zhang
authors.forename: Jiajun
authors.initials: J
authors.lastname: Gu
authors.forename: Qinglei
authors.initials: Q
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Deng
authors.forename: Di
authors.initials: D
authors.lastname: Zhang
authors.forename: Hai-Qing
authors.initials: HQ
authors.lastname: Lin
mesh_terms: D000818:Animals; D002080:Butterflies; D003116:Color; D008962:Models, Theoretical; D014921:Wings, Animal