Reconfigurable Metasurface for Nearly Full-Range and Continuous Modulation of Reflection, Transmission, and Absorption,ACS Applied Electronic Materials

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Reconfigurable Metasurface for Nearly Full-Range and Continuous Modulation of Reflection, Transmission, and Absorption
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2022-02-15 , DOI: 10.1021/acsaelm.1c01280
Xinyun Song ₁ , Xudong Bai ₂ , Weiren Zhu ₁

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Reconfigurable metasurfaces with versatile functionalities are highly demanded for various practical applications. In this paper, a varactor-based metasurface is proposed for dynamic and continuous modulation of reflection, transmission, and absorption in a single design. The proposed metasurface consists of a dielectric layer sandwiched by two metallic layers with different patterns, and varactors are loaded on both metallic layers. By controlling the bias voltages applied to the varactors, this metasurface can exhibit nearly full-range and continuous modulation of reflection, transmission, and absorption. Particularly, nearly perfect reflection, transmission, and absorption have been achieved by proper combinations of bias voltages. Coupled mode theory is further developed to offer a physical insight of the metasurface. The above concept is confirmed by numerical simulations and experiments in a microwave waveguide system. As this proposal concerns a metasurface with high degrees of freedom, it may find practical applications including radar cross-section reduction as well as smart radomes.

中文翻译：

用于反射、透射和吸收的近全范围和连续调制的可重构超表面

各种实际应用都非常需要具有多种功能的可重构超表面。在本文中，提出了一种基于变容二极管的超表面，用于在单一设计中对反射、透射和吸收进行动态和连续调制。所提出的超表面由夹在两个具有不同图案的金属层的介电层组成，并且变容二极管加载在两个金属层上。通过控制施加到变容二极管的偏置电压，这种超表面可以表现出几乎全范围和连续的反射、透射和吸收调制。特别是，通过适当的偏置电压组合已经实现了近乎完美的反射、透射和吸收。耦合模式理论得到进一步发展，以提供对超表面的物理洞察。上述概念通过微波波导系统中的数值模拟和实验得到证实。由于该提议涉及具有高自由度的超表面，它可能会找到实际应用，包括雷达横截面减少以及智能天线罩。

更新日期：2022-02-15

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