Ahmadi Zahra, Saghaei Hamed, Pasdari-Kia Mohammad, Ahmadi Haddi, Razmjooei Nasrin, Ghoreishi Farzaneh Sadat, Zafari Kazem, Arik Kamalodin, Nezamdoost Hamid, Nooshyar Mahdi, Oraizi Homayoon
Department of Electrical Engineering, Tarbiat Modares University, Tehran, 14119-44961, Iran.
Energy and Environment Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran.
Sci Rep. 2025 Feb 19;15(1):6033. doi: 10.1038/s41598-025-90517-y.
Quasi-line waves represent a distinct class of propagation modes along non-complementary impedance surfaces, offering an alternative to the conventional line waves typically formed by complementary impedance surfaces. In this study, we introduce a novel design for quasi-line waves utilizing non-dual, purely inductive impedance structures. By incorporating multilayer graphene, our design achieves wide bandwidth and extended propagation lengths in the terahertz range, with field concentration localized at the edges of the inductive surfaces. This configuration enables unidirectional wave propagation, with graphene integration providing precise control over bandwidth and transmission characteristics. Unlike traditional line waves, which are constrained to specific terahertz frequency ranges, our quasi-line mode-guided by self-inductive impedance surfaces-demonstrates significantly broader bandwidth and enhanced electric field intensity. The performance of this mode is strongly influenced by capacitance variations between impedance surfaces, exceeding the singularity limitation of conventional line waves. Our proposed structure demonstrates superior performance in both bandwidth and mode singularity within the terahertz spectrum, surpassing traditional line wave designs.
准线波代表了一类沿非互补阻抗表面传播的独特模式，为通常由互补阻抗表面形成的传统线波提供了一种替代方案。在本研究中，我们介绍了一种利用非对偶、纯电感阻抗结构的准线波新颖设计。通过整合多层石墨烯，我们的设计在太赫兹范围内实现了宽带宽和扩展的传播长度，场集中位于电感表面的边缘。这种配置实现了单向波传播，石墨烯的整合提供了对带宽和传输特性的精确控制。与传统线波不同，传统线波被限制在特定的太赫兹频率范围内，我们的由自感抗表面引导的准线模式展示了显著更宽的带宽和增强的电场强度。这种模式的性能受到阻抗表面之间电容变化的强烈影响，超过了传统线波的奇异性限制。我们提出的结构在太赫兹频谱的带宽和模式奇异性方面都表现出卓越的性能，超越了传统线波设计。
