用于电磁能量收集的双频极化不敏感广角元表面

IF 2.5 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2024-11-26 DOI:10.1016/j.photonics.2024.101328

Zhichao Shen , Bo Lv , Zao Yi , Ye Tian , Yuxi Jin , Sijie Wang , Ting Liu , Shiyun Xia , Hongyang Mu , Xuanrui Zhang , Jinhui Shi

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引用次数: 0

摘要

最近，人们研究了各种基于超材料的采集器，用于从周围环境中采集电磁能。然而，它们存在吸收带宽窄和能量收集效率低的问题。在本文中，我们提出了一种用于收集环境电磁能的微型双层超表面，它具有广角响应性和极化不敏感性。该元表面由两个金属环和两层电介质基板组成。研究结果表明，该收集器可在 S 波段和 C 波段内工作，共振频率分别为 2.98 千兆赫和 4.32 千兆赫。这些共振频率会引起电偶极子振荡，从而促进对电磁波的强烈吸收。在这两个频率下，采集效率可达 92.5 % 和 93.4 %。此外，还分析了入射波在各种入射角和偏振角范围内的性能。该采集器未来可用于采集通信或雷达的冗余电磁能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dual-frequency polarization-insensitive and wide-angle metasurface for electromagnetic energy harvesting

Recently, various metamaterial-based harvesters have been investigated for harvesting electromagnetic energy from the ambient environment. However, they suffer from narrow absorption bandwidths and low energy harvesting efficiency. In this paper, we propose a miniaturized dual-layer metasurface designed for harvesting ambient electromagnetic energy, featuring wide-angle responsivity and polarization-insensitivity. The metasurface comprises two metal rings and two layers of dielectric substrates. The results demonstrate that the harvester functions within the S- and C-bands, resonating at frequencies of 2.98 GHz and 4.32 GHz, respectively. These resonant frequencies induce electric dipole oscillations, facilitating strong absorption of electromagnetic waves. The harvesting efficiency can reach to 92.5 % and 93.4 % at the two frequencies. Moreover, the harvester performance over a wide range of incidence angles and various polarized angles of the incident wave is analyzed. The harvester can be used for harvesting the redundant electromagnetic energy of communications or radars in the future.

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来源期刊

Photonics and Nanostructures-Fundamentals and Applications 工程技术-材料科学：综合

CiteScore

5.00

自引率

3.70%

发文量

审稿时长

62 days

期刊介绍： This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.