Beijing Key Laboratory of Network System Architecture and Convergence, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, P.O. Box. 282, 100876, Beijing, China.
Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, P.O. Box. 282, 100876, Beijing, China.
Sci Rep. 2017 Sep 5;7(1):10558. doi: 10.1038/s41598-017-10726-y.
A graphene-based plasmonic metasurface which can independently control different polarized electromagnetic waves with reasonably small losses in terahertz regime is proposed and demonstrated in this paper. This metasurface is composed of graphene based elements. Owing to anisotropic plasmonic resonance of the graphene-based elements, the reflected phases and magnitudes of orthogonally polarized waves can be independently controlled by varying dimensions of the element. Four types of graphene-based plasmonic metasurfaces with different reflected phases distributions are synthesized and simulated, exhibiting diverse functions such as polarized beam splitting, beam deflection, and linear-to-circular polarization conversion. The simulation results demonstrate excellent performances as theoretical expectation. The proposed graphene-based plasmonic metasurface can be applied to realize extremely light-weight, ultra-compact, and high-performances electromagnetic structures for diverse terahertz applications.
本文提出并演示了一种基于石墨烯的等离子体超表面，它可以在太赫兹波段以较小的损耗独立控制不同偏振的电磁波。该超表面由基于石墨烯的单元组成。由于基于石墨烯的单元的各向异性等离子体共振，通过改变单元的尺寸可以独立控制正交偏振波的反射相位和幅度。合成并模拟了四种具有不同反射相位分布的基于石墨烯的等离子体超表面，展示了偏振光束分裂、光束偏转和线到圆偏振转换等多种功能。模拟结果与理论预期相符，表现出了优异的性能。所提出的基于石墨烯的等离子体超表面可用于实现超轻、超紧凑、高性能的太赫兹应用的电磁结构。
