Open AccessEffective, angle-independent radiative cooler based on one-dimensional photonic crystal
Author(s) -
Huaxin Yuan,
Chenying Yang,
Xiaowen Zheng,
Wen Ning Mu,
Zhen Wang,
Weiyong Yuan,
Yueguang Zhang,
Chaonan Chen,
Le Xu,
Weidong Shen
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.027885
Subject(s) - optics , materials science , photonic crystal , emissivity , radiative transfer , radiative cooling , broadband , fresnel equations , optoelectronics , physics , refractive index , meteorology
A simple and low-cost radiative cooler based on one-dimensional photonic crystal is proposed in this work, which has an average emissivity of 96% within the atmospheric transparency window (8-13μm). The ultra-broadband emissivity property is realized by constructing the strongly overlapped optical resonances with a tandem structure composed of two lossy materials while an additional lossless material is adopted as the top layer to reduce the Fresnel reflection of the whole structure. The maximum cooling power density of the fabricated radiative cooler can reach 113.0W/m 2 at night. When integrated with an excellent solar reflector that can reflect 97% incident solar power, it theoretically has the maximum cooling power of 83.0 W/m 2 in the case of solar irradiance up to 1000 W/m 2 at noon.