[7a-PA3-1~17] 3.2 Equipment optics and materials

[7a-PA3-12] Numerical analysis of solar reflective periodic structure

〇Kazutaka Isoda^1,2, Koki Nagata¹, Mizue Ebisawa¹, Yukitoshi Otani² (1.Tokyo Metropolitan Industrial Technology Research Institute, 2.Utsunomiya Univ)

Keywords:angular reflectivity, metal periodic microstructure, Rigorous coupled wave analysis

High solar reflectance coatings are commercially used to reduce urban heat island effect. Solar absorption in winter-season is also needed to obtain more energy efficiencies. Metal periodic microstructures were calculated by RCWA method. As a result, angular selective reflection microstructure that behaves reflective surface against summer solar irradiation, and absorptive to winter solar irradiation was obtained.