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Independent Manipulating of Orthogonal-Polarization Terahertz Waves Using A Reconfigurable Graphene-Based Metasurface

机译:使用可重构的基于石墨烯的超表面独立地正交极化太赫兹波

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摘要

Viewing the trend of miniaturization and integration in modern electronic device design, a reconfigurable multi-functional graphene-based metasurface is proposed in this paper. By virtue of the reconfigurability of reflection patterns, this metasurface is able to independently manipulate orthogonal linearly polarized terahertz wave. The building blocks of the proposed metasurface are series of graphene-strips-based unit-cells. Each unit-cell consists of two orthogonal graphene strips and a grounded substrate, which has anisotropic responses for each of orthogonal polarizations (x-polarized and y-polarized waves). The reflection phases of both x- and y-polarized waves can be controlled independently through separate electrical tuning. Based on the proposed metasurface, functionalities including beam splitting, beam deflecting, and linear-to-circular polarization converting using a shared aperture are numerically demonstrated and analyzed. Simulation results demonstrate excellent performance, which is consistent with the theorized expectations. This work paves the way for enhancing the miniaturization of modern electronic/optical devices and potentially has important applications in the next-generation information systems for communication, sensing, and imaging.
机译:鉴于现代电子设备设计中的小型化和集成化趋势,本文提出了一种可重构的基于多功能石墨烯的超颖表面。由于反射图案的可重构性,该超表面能够独立地操纵正交线性极化太赫兹波。提出的超颖表面的构建块是一系列基于石墨烯带的晶胞。每个晶胞由两个正交的石墨烯带和一个接地的基板组成,该基板对每个正交极化(x极化和y极化波)具有各向异性响应。 x偏振波和y偏振波的反射相位都可以通过单独的电调谐来独立控制。基于提出的超颖表面,对包括分束,光束偏转和使用共享孔径的线圆偏振转换的功能进行了数值演示和分析。仿真结果证明了优异的性能,这与理论上的预期是一致的。这项工作为增强现代电子/光学设备的小型化铺平了道路,并且可能在下一代用于通信,传感和成像的信息系统中具有重要的应用。

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