Ahmadi Haddi, Ahmadi Zahra, Razmjooei Nasrin, Pasdari-Kia Mohammad, Bagheri Amirmasood, Saghaei Hamed, Arik Kamalodin, Oraizi Homayoon
Department of Electrical Engineering, Sharif University of Technology, 11155-4365, Tehran, Iran.
Department of Electrical Engineering, Tarbiat Modares University, 197-14115, Tehran, Iran.
Sci Rep. 2024 Mar 8;14(1):5704. doi: 10.1038/s41598-024-56049-7.
Line waves (LWs) refer to confined edge modes that propagate along the interface of dual electromagnetic metasurfaces while maintaining mirror reflection symmetries. Previous research has both theoretically and experimentally investigated these waves, revealing their presence in the microwave and terahertz frequency ranges. In addition, a comprehensive exploration has been conducted on the implementation of non-Hermitian LWs by establishing the parity-time symmetry. This study introduces a cutting-edge dual-band line-wave waveguide, enabling the realization of LWs within the terahertz and infrared spectrums. Our work is centered around analyzing the functionalities of existing applications of LWs within a specific field. In addition, a novel non-Hermitian platform is proposed. We address feasible practical implementations of non-Hermitian LWs by placing a graphene-based metasurface on an epsilon-near-zero material. This study delves into the advantages of the proposed framework compared to previously examined structures, involving both analytical and numerical examinations of how these waves propagate and the underlying physical mechanisms.
线波（LWs）指的是沿双电磁超表面界面传播同时保持镜反射对称性的受限边缘模式。先前的研究已从理论和实验两方面对这些波进行了研究，揭示了它们在微波和太赫兹频率范围内的存在。此外，通过建立宇称 - 时间对称性，对非厄米线波的实现进行了全面探索。本研究引入了一种前沿的双波段线波导，能够在太赫兹和红外光谱范围内实现线波。我们的工作围绕分析线波在特定领域现有应用的功能展开。此外，还提出了一个新颖的非厄米平台。我们通过将基于石墨烯的超表面放置在近零介电常数材料上来探讨非厄米线波可行的实际实现方式。本研究深入探讨了所提出的框架与先前研究结构相比的优势，涉及对这些波如何传播以及潜在物理机制的分析和数值研究。
