光子学
电子设备和系统的热管理
热的
材料科学
光电子学
计算机科学
地理
机械工程
气象学
工程类
作者
Wei Li,Yu Shi,Zhen Chen,Shanhui Fan
标识
DOI:10.1038/s41467-018-06535-0
摘要
The colours of outdoor structures, such as automobiles, buildings and clothing, are typically chosen for functional or aesthetic reasons. With a chosen colour, however, one must control the radiative thermal load for heating or cooling purposes. Here we provide a comprehensive calculation of the tunable range of radiative thermal load for all colours. The range exceeds 680 Wm-2 for all colours, and can be as high as 866 Wm-2, resulting from effects of metamerism, infrared solar absorption and radiative cooling. We experimentally demonstrate that two photonic structures with the same pink colour can have their temperatures differ by 47.6 °C under sunlight. These structures are over 20 °C either cooler or hotter than a commercial paint with a comparable colour. Furthermore, the hotter pink structure is 10 °C hotter than a commercial black paint. These results elucidate the fundamental potentials of photonic thermal management for coloured objects.
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