Single-layer, cascaded and broadband-heat-dissipation metasurface for multi-wavelength lasers and infrared camouflage
用于多波长激光器和红外伪装的单层、级联和宽带散热元表面
複数波長レーザーおよび赤外線の迷彩のための単層、カスケードおよびブロードバンド散熱メタ表面
다파장 레이저와 적외선 위장을 위한 단층, 카스케이드 및 광대역 열분산 메타표면
Metasuperficie de una sola capa, en cascada y de disipación de calor de banda ancha para láseres de múltiples longitudes de onda y camuflaje infrarrojo
Metasurface à dissipation thermique à couche unique, en cascade et à large bande pour lasers à longueurs d'onde multiples et camouflage infrarouge
Однослойная, каскадная и широкополосная метаповерхность теплового рассеивания для многоволнных лазеров и инфракрасного камуфляжа
Xingdong Feng 冯兴东 ¹ ², Tianqi Zhang 张天琪 ¹ ², Xuejun Liu 刘雪军 ³, Fan Zhang 张帆 ³, Jianjun Wang 王建军 ² ⁴, Hong Bao 保宏 ¹ ², Shan Jiang 江山 ¹ ² ³ ⁴, YongAn Huang 黄永安 ³
¹ Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China
中国 杭州 西安电子科技大学杭州研究院
² School of Mechano-Electronic Engineering, Xidian University, Xi'an 710071, China
中国 西安 西安电子科技大学机电工程学院
³ State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
中国 武汉 华中科技大学 智能制造装备与技术全国重点实验室
⁴ State Key Laboratory of Electromechanical Integrated Manufacturing of High-performance Electronic Equipments, Xidian University, Xi'an 710071, China
中国 西安 西安电子科技大学 高性能电子装备机电集成制造全国重点实验室
The combination of advanced photoelectric detectors has rendered single-band camouflage materials ineffective, necessitating the development of infrared multispectral camouflage. However, the design and fabrication of existing works remain complex as they usually require the integration of multiscale structures. Here, we introduce phase modulation into the infrared camouflage metasurfaces with metal-dielectric-metal configuration, enabling them to achieve camouflage across more bands.
Based on this strategy, a simple but effective single-layer cascaded metasurface is demonstrated for the first time to achieve low reflection at multi-wavelength lasers, low infrared radiation in atmospheric windows, and broadband thermal management. As a proof-of-concept, a 4-inch sample with a minimum linewidth of 1.8 μm is fabricated using photolithography. The excellent infrared multispectral camouflage performance is verified in experiments, showing low reflectance in 0.9–1.6 μm, low infrared emissivity in mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) bands, and high absorptance at the wavelength of 10.6 μm.
Meanwhile, broadband high emissivity in 5–8 μm can provide high-performance radiative heat dissipation. When the input power is 1.57 W∙cm-2, the surface/radiation temperature of the metasurface decreases by 5.3 °C/18.7 °C compared to the reference. The proposed metasurface may trigger further innovation in the design and application of compact multispectral optical devices.
