Infrared camouflage is an effective technique to avoid many kinds of target detection by detectors in the infrared band. For a high-temperature environment, thermal management of selective emission is crucial to dissipate heat in the mid-infrared non-atmospheric window (5–8 μm). However, it still remains challenges for balancing infrared camouflage and thermal management. Here, we experimentally demonstrate a multilayer film structure (MFS) for infrared camouflage with thermal management. Combining the ideal emission spectrum and genetic algorithm (GA), the inverse-design MFS containing 7 layers of five materials (SiO2, Ge, ZnS, Pt and Au) has been designed. Based on the hierarchical metamaterial, the optimized MFS has high performance of infrared camouflage to against the lidar detection in the near-infrared band. The experimental results reveal the high compatible efficiency among thermal camouflage (ε 3–5μm = 0.21, ε 8–14μm = 0.16), laser stealth (ε 1.06μm = 0.64, ε 1.55μm = 0.90, ε 10.6μm = 0.76) and thermal management (ε 5–8μm = 0.54). Therefore, the proposed MFSs are attractive as basic building block of selective emitter, for the application of advanced photonics such as radiative cooling, infrared camouflage, and thermal emission.

中文翻译：

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基于逆向设计和分层超材料的热管理红外伪装实现

红外伪装是一种在红外波段避免探测器探测到多种目标的有效技术。对于高温环境，选择性发射的热管理对于在中红外非大气窗口（5-8 μm）中散热至关重要。然而，平衡红外伪装和热管理仍然存在挑战。在这里，我们通过实验展示了一种用于红外伪装和热管理的多层薄膜结构 (MFS)。结合理想发射光谱和遗传算法（GA），逆向设计包含7层五种材料（SiO2个, Ge, ZnS, Pt 和 Au) 被设计出来。基于分层超材料，优化的MFS具有高性能的红外伪装性能，可以对抗近红外波段的激光雷达探测。实验结果揭示了热伪装之间的高兼容效率（ε 3-5μm= 0.21,ε 8–14μm= 0.16), 激光隐身 (ε 1.06μm= 0.64，ε 1.55μm= 0.90,ε 10.6μm= 0.76) 和热管理 (ε 5-8μm= 0.54）。因此，所提出的 MFS 作为选择性发射器的基本构建块具有吸引力，可用于辐射冷却、红外伪装和热发射等先进光子学的应用。