The male butterfly Morpho didius displays a brilliant blue color with a less viewing angle dependence. It is known that this coloring does not come from pigments but from the surface micro/nano-structure in the wing. Structural-coloring based on a multilayer interference has a viewing angle dependence, but the structural-coloring of Morpho didius has a less viewing angle dependence. By analyzing the coloring mechanisms, We achieved a structural-color display with a less viewing angle dependence. I have fabricated the structures which display different bright structural-colors

References :
Eiji Iwase, Kiyoshi Matsumoto, Isao Shimoyama, “The Structural-Color Based on the Mechanism of Butterfly Wing Coloring for Wide Viewing Angle Reflective Display,” 17th IEEE International Conference on Micro Electro Mechanical Systems (MEMS '04), pp. 105-108, Maastricht, The Netherlands, Jan. 25-29, 2004. [Proceedings]