Yuan Liming, Huang Cheng, Liao Jianming, Ji Chen, Huang Jingkai, Wang Yuetang, Luo Xiangang
State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China.
School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049, China.
Adv Sci (Weinh). 2022 Aug;9(22):e2201054. doi: 10.1002/advs.202201054. Epub 2022 Jun 5.
With rapid development of radar and infrared (IR) surveillance technologies, the need for microwave-IR compatible camouflage is now more than ever. Here, a novel multispectral metadevice is proposed to simultaneously achieve microwave scattering reduction, dynamic IR camouflage, and low IR reflection. This metadevice is constructed by the coding thermoelectric elements with the properly designed phase arrangement, and the incident microwave energy can be redirected to the nonthreatening directions for specular reflection reduction. The dynamic IR camouflage with low IR reflection is realized by using the thermoelectric cooling and heating effect and high-IR-absorptivity surface. The above three functionalities are demonstrated by experimental measurement. The 10 dB scattering reduction can be realized at the microwave band of 10-16.1 GHz. In the IR region, the designed metadevice can not only dynamically modulate the surface temperature for matching different background temperatures, but also realize the pixel temperature control for adapting to a spatially varying thermal background. In addition, it reflects almost no surrounding thermal signals compared with the traditional low-emissivity IR stealth material. This study paves an effective way to achieve microwave-IR compatible camouflage, which may inspire the future researches and applications in multispectral camouflage and stealth fields.
随着雷达和红外（IR）监视技术的迅速发展，对微波-红外兼容伪装的需求比以往任何时候都更加迫切。在此，提出了一种新型多光谱超材料器件，以同时实现微波散射减少、动态红外伪装和低红外反射。该超材料器件由具有适当设计相位排列的编码热电元件构成，入射的微波能量可以被重定向到非威胁方向，以减少镜面反射。利用热电冷却和加热效应以及高红外吸收率表面实现了具有低红外反射的动态红外伪装。通过实验测量证明了上述三种功能。在10 - 16.1 GHz的微波频段可实现10 dB的散射减少。在红外区域，所设计的超材料器件不仅可以动态调节表面温度以匹配不同的背景温度，还可以实现像素温度控制以适应空间变化的热背景。此外，与传统的低发射率红外隐身材料相比，它几乎不反射周围的热信号。本研究为实现微波-红外兼容伪装铺平了一条有效途径，这可能会激发多光谱伪装和隐身领域的未来研究与应用。
