title: Large-visual-angle microstructure inspired from quantitative design of Morpho butterflies' lamellae deviation using the FDTD/PSO method.
abstract: The wide angular range of the treelike structure in Morpho butterfly scales was investigated by finite-difference time-domain (FDTD)/particle-swarm-optimization (PSO) analysis. Using the FDTD method, different parameters in the Morpho butterflies' treelike structure were studied and their contributions to the angular dependence were analyzed. Then a wide angular range was realized by the PSO method from quantitatively designing the lamellae deviation (Δy), which was a crucial parameter with angular range. The field map of the wide-range reflection in a large area was given to confirm the wide angular range. The tristimulus values and corresponding color coordinates for various viewing directions were calculated to confirm the blue color in different observation angles. The wide angular range realized by the FDTD/PSO method will assist us in understanding the scientific principles involved and also in designing artificial optical materials.
authors: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Wanlin
authors: W
authors: Wang
authors: Wang
authors: W
authors: Zhang
authors: Weixin
authors: W
authors: Chen
authors: Jiajun
authors: J
authors: Gu
authors: Qinglei
authors: Q
authors: Liu
authors: Tao
authors: T
authors: Deng
authors: Di
authors: D
authors: Zhang
mesh_terms: D000818:Animals; D002080:Butterflies / Q000502:physiology*; D003116:Color; D003198:Computer Simulation; D008027:Light; D008422:Materials Testing; D008954:Models, Biological; D015233:Models, Statistical; D055095:Optics and Photonics; D013269:Stochastic Processes; D014921:Wings, Animal / Q000737:chemistry*