Niu Junhao, Zhang Chaobo, Mo Wei, Zhu Aijun
Appl Opt. 2025 Apr 10;64(11):2772-2779. doi: 10.1364/AO.557664.
In this paper, we propose a polarization-insensitive and ultra-bandwidth terahertz metamaterial absorber based on vanadium dioxide. The absorber consists of a vanadium dioxide () resonant layer, a photonic crystal slab dielectric layer, and a metallic reflection layer. When is in the metallic state, the absorber realizes ultra-bandwidth absorption in the frequency range of 4.78-13.28 THz, with a high average absorption rate of 97.5%, an absorption bandwidth of 8.5 THz, and a relative bandwidth of 94.1%. The absorption of the absorber can be dynamically adjusted between 1.2% and 97.5% by varying the conductivity of vanadium dioxide. The absorber has polarization insensitivity and wide-angle absorption characteristics, and the absorption rate is maintained above 80% in the incident angle range of 0°-50°. In addition, ultra-wideband absorbers are suitable for multi-band compatible systems (such as the collaborative design of 6G communication and infrared stealth).
在本文中，我们提出了一种基于二氧化钒的偏振不敏感且超宽带太赫兹超材料吸收器。该吸收器由二氧化钒（）谐振层、光子晶体平板介电层和金属反射层组成。当处于金属态时，该吸收器在4.78 - 13.28太赫兹频率范围内实现超宽带吸收，平均吸收率高达97.5%，吸收带宽为8.5太赫兹，相对带宽为94.1%。通过改变二氧化钒的电导率，该吸收器的吸收率可在1.2%至97.5%之间动态调节。该吸收器具有偏振不敏感性和广角吸收特性，在0° - 50°入射角范围内吸收率保持在80%以上。此外，超宽带吸收器适用于多频段兼容系统（如6G通信与红外隐身的协同设计）。
