Aliqab Khaled, Armghan Ammar, Alsharari Meshari
Department of Electrical Engineering. College of Engineering, Jouf University, 72388, Sakaka, Saudi Arabia.
Sci Rep. 2024 Aug 19;14(1):19149. doi: 10.1038/s41598-024-70251-7.
This paper introduces a novel, cost-effective solution designed to achieve large absorption bandwidth within the THz spectrum employing a miniaturized, single-layer metamaterial structure. The designed structure features a single circular ring composed of an ohmic resistive sheet with notably higher sheet resistance than traditional metallic resonators. This distinctive design is implemented on a lossy dielectric polyimide substrate with a backing of metallic gold. Our developed absorbing structure demonstrates the capability to achieve a substantial absorption bandwidth ranging from 3.78 to 4.25 THz, maintaining a consistent absorption rate of over 90%. Moreover, we conducted an analysis to assess its absorption performance under various sheet resistance values within the top layer. Additionally, we characterized its angular stability and polarization insensitivity through oblique incident and polarization angle analysis. Finally, an RLC circuital and interference theory approach is adopted to justify its simulated results. The proposed absorber shows potential for a broad spectrum of applications, encompassing communication, imaging, and diverse integrated circuits operating within the THz band.
本文介绍了一种新颖且具有成本效益的解决方案，旨在采用小型化的单层超材料结构在太赫兹频谱内实现大吸收带宽。所设计的结构具有一个由欧姆电阻片组成的单圆环，其表面电阻明显高于传统金属谐振器。这种独特的设计是在具有金属金背衬的有损介电聚酰亚胺基板上实现的。我们开发的吸收结构展示了实现从3.78至4.25太赫兹的大幅吸收带宽的能力，保持超过90%的一致吸收率。此外，我们进行了分析以评估其在顶层各种表面电阻值下的吸收性能。另外，我们通过斜入射和偏振角分析表征了其角度稳定性和偏振不敏感性。最后，采用RLC电路和干涉理论方法来验证其模拟结果。所提出的吸收器在通信、成像以及在太赫兹频段工作的各种集成电路等广泛应用领域显示出潜力。
