With the continuous improvement of detection technology, higher requirements are put forward for infrared camouflage. Conventional low-emissivity materials have serious thermal instability, which increases the risk of detection. There is an urgent need to investigate more efficient infrared stealth materials. We design a metamaterial selective broadband emitter that utilizes multi-resonance coupling of metal patterns for infrared stealth. The proposed design exhibits low emissivity in the infrared atmosphere windows (3 to 5 μm and 8 to 14 μm) for infrared suppression and high emissivity in the non-infrared atmosphere window (5 to 8 μm) for radiative cooling. We introduce a supplementary design for high-temperature environments to meet a broader application need. Moreover, the low angle-dependence of the metamaterial emitter enables it to maintain broadband absorption characteristics even under large-angle incidence. This proposed approach serves as an effective supplement to the design of metamaterial broadband emitters and holds great potential for applications in infrared stealth, radiative cooling, thermal detection, sensors, thermophotovoltaics, and various other fields.

中文翻译：

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用于选择性热发射的多共振耦合金属图案超材料

随着探测技术的不断提高，对红外伪装提出了更高的要求。传统的低发射率材料具有严重的热不稳定性，增加了检测的风险。迫切需要研究更高效的红外隐身材料。我们设计了一种超材料选择性宽带发射器，利用金属图案的多共振耦合来实现红外隐形。所提出的设计在用于红外抑制的红外大气窗口（3至5μm和8至14μm）中表现出低发射率，在用于辐射冷却的非红外大气窗口（5至8μm）中表现出高发射率。我们引入了针对高温环境的补充设计，以满足更广泛的应用需求。此外，超材料发射器的低角度依赖性使其即使在大角度入射下也能保持宽带吸收特性。该方法是超材料宽带发射器设计的有效补充，在红外隐身、辐射冷却、热探测、传感器、热光伏等领域具有巨大的应用潜力。