Opt Lett. 2023 Feb 15;48(4):908-911. doi: 10.1364/OL.481967.
Near-perfect light harvesting of a metasurface-based absorber paves the way for achieving numerous potential applications in sensing, cloaking, and photovoltaics. Here, we present a reconfigurable perfect absorber based on a molybdenum ditelluride (MoTe) hybrid metasurface at terahertz (THz) frequency. By investigating the optical response of metasurface-based absorbers, a reconfigurable switching of dual-frequency perfect absorption to a new single-frequency absorption takes place when light illuminates MoTe. Moreover, the absorption mechanism of the hybrid metasurface is well demonstrated with the analytical coupled-dipole model and impedance analysis. The proposed reconfigurable THz meta-absorber provides a new, to the best of our knowledge, route for active radar stealth, frequency-selective detection, and next-generation wireless communication.
基于亚表面的吸收器近乎完美的光捕获为在传感、隐身和光伏领域实现众多潜在应用铺平了道路。在这里，我们提出了一种基于二碲化钼 (MoTe) 混合亚表面的太赫兹 (THz) 频率可重构完美吸收器。通过研究基于亚表面的吸收器的光学响应，当光照射 MoTe 时，双频完美吸收发生了可重构的切换到新的单频吸收。此外，采用解析偶极子模型和阻抗分析对混合亚表面的吸收机制进行了很好的论证。所提出的可重构 THz 超吸收器为主动雷达隐身、频率选择检测和下一代无线通信提供了一条新的、据我们所知的途径。
