All-Dielectric Metasurfaces Color Filter Arrays Designed by Evolutionary Search

Compared with traditional dyes, structural color has been studied widely due to several outstanding advantages. When choosing structural color materials, both metal and dielectric materials have great potential, however compared with metal, dielectric material have the characteristics of low cost and low loss, so been studied widely. At present, the design of metasurface structural color based on dielectric materials is mostly carried out by manually adjusting parameters. Although good results can achieved by this method, but the design cycle is too long and the method is not smart enough, which is not conducive to industrial design. In this article, we proposed a combination of intelligent algorithms and finite domain time domain solution, and designed matesurface structural color successfully that can reflect high-quality colors. The reflection peak value of the RGB colors reached 90%, 82.2%, 45.8% respectively, also accompany with narrow FWHM, the designed structural color has strong robustness and method reusability, meanwhile, our work provides a novel way for the design of reflective structural color.