Luo Mingyu, Xie Tong, Li Xin, Zheng Lin, Du Te, Zhang Zhenrong, Yang Junbo
Opt Express. 2024 Mar 25;32(7):11221-11240. doi: 10.1364/OE.518073.
Laser-guided detector and infrared detection have attracted increasing attention in a wide range of research fields, including multispectral detection, radiative cooling, and thermal management. Previously reported absorbers presented shortcomings of lacking either tunability or compatibility. In this study, a metamaterial perfect absorber based on a Helmholtz resonator and fractal structure is proposed, which realizes tunable perfect absorptivity ( >0.99, >0.99) of guided-laser radar dual operating bands (1.06 µm and 10.6 µm) and a low infrared average emissivity (¯ =0.03,¯ =0.31) in two atmospheric windows for compatible camouflage. The proposed perfect absorber provides a dynamically tunable absorptivity without structural changes and can be applied to optical communication, military stealth or protection, and electromagnetic detection.
激光制导探测器和红外探测在包括多光谱探测、辐射冷却和热管理在内的广泛研究领域中受到了越来越多的关注。先前报道的吸收体存在缺乏可调谐性或兼容性的缺点。在本研究中，提出了一种基于亥姆霍兹谐振器和分形结构的超材料完美吸收体，该吸收体在制导激光雷达的两个工作波段（1.06 µm和10.6 µm）实现了可调谐完美吸收率（吸收率>0.99，吸收率>0.99），并在两个大气窗口具有低红外平均发射率（平均发射率=0.03，平均发射率=0.31），以实现兼容伪装。所提出的完美吸收体在不改变结构的情况下提供了动态可调的吸收率，可应用于光通信、军事隐身或防护以及电磁探测。
