Integrated Design of Multispectral Metasurface for Microwave Scattering Control and Low Infrared Emissivity

With the rapid development of multi-spectrum detection equipment, the demand for instruments and equipment that can work in various spectrum environments is increasing. In this work, we propose an integrated infrared-microwave compatible metasurface design. For microwave, meta-atoms with pi phase difference are realized by designing structures with different resonances, and the meta-atoms are arranged as chessboard to control scattering beams. For infrared, owning to the high metal filling ratio of the meta-atoms, the low infrared emissivity can be realized at the same layer. The designed metasurface is verified by theoretical calculation and numerical simulation. After verification, the metasurface can scatter four beams in chessboard arrangement while the infrared emissivity is 0.2195. Encouragingly, this work provides a multi-spectrum compatible integrated design method for metasurface which can be extended to more spectrum.