Stretchable metal-dielectric-metal metasurface for dynamic radiation management

• Sijie Pian, Chengtao Lu, Zhuning Wang, and Yaoguang Ma
• received 02/28/2024; accepted 04/12/2024; posted 04/15/2024; Doc. ID 522582
• Abstract: Radiative cooling devices offer passive characteristics and hold significant potential for reducing energy consumption.However, to address changing climate needs, dynamic devices with tunable radiation properties are crucial. Here, wepropose a novel design for tunable radiative thermal management utilizing a reconfigurable flexible metasurface emitter.By applying biaxial stretching to alter the metasurface's periodicity, its optical response can be continuously modulated.At ambient temperature, with a stretch ratio of 1.6, the device is predicted to achieve thermal management powermodulations of 173 W/m2 and 42 W/m2 during daytime and nighttime, respectively. This approach holds promise forimproving the efficiency of thermal management systems in applications such as buildings and smart windows.