Asymmetric electric field distribution enhanced hierarchical metamaterials for radar-infrared compatible camouflage
作者机构：Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province)School of Materials Science and EngineeringDalian University of TechnologyDalian 116085China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第146卷第15期
页 面：10-18页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：supported by the National Natural Science Foundation of China(Nos.52103334,52071053,and U1704253) China Postdoctoral Science Foundation(Nos.2020M680946,2020M670748) the Fundamental Research Funds for the Central Universities(No.DUT20GF111)
主 题：Hierarchical metamaterials Radar-infrared compatible stealth Genetic algorithm Magnetic-dielectric lossy composites Asymmetry
摘 要：Metamaterials are widely used in electromagnetic radiation and camouflage for their flexible wavefront manipulation and polarization over a broad spectrum ranging from microwaves to ***,multispectral compatible camouflage faces significant challenges due to tremendous scale differences of unit cells and desired radiative properties in various spectral *** study assembles a micron-scale infrared emitter,a millimeter-scale microwave absorber,and a metal reflector to propose a hierarchical metamaterial that reduces microwave scattering and reflects low-infrared *** a proof of concept,laser etching micro-manufactures an upper infrared shielding layer with a periodic metal *** the same time,bottom square frustum metastructure composites are fabricated and optimized based on genetic *** the normal incidence transverse electromagnetic wave with a 90°azimuth angle,the hierarchical strategy and infrared unit create an asymmetric electric field distribution of local near-field coupling,which is conducive to generating additional resonance for broadening the absorption *** verify the multispectral camouflage,which shows a high absorption efficiency of more than 90%,ranging from 3.6 to 6.2 and from 8.4 to 18 GHz with a total thickness of 4.05 mm(0.049λmax).Due to the non-reflection of surrounding thermal signals in the infrared 2-22μm region,low-infrared emissivity(0.29)metamaterials can adapt to various thermal *** methodology can provide a novel route for fabricating multispectral camouflage devices.
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