A hybrid dual-frequency polarized reconfigurable terahertz antenna is designed and studied. Graphene and TOPAS are employed as the polarization conversion metasurface and dielectric substrate, respectively, enabling tunable polarization conversion and circular polarization. TOPAS is a good substrate material for broadband THz components due to its low absorption. By adjusting the chemical potential of graphene between 0 eV and 0.5 eV, the polarization state in the band of 1 THz (0.76–1.02 THz) and 2.5 THz (2.43–2.6 THz) can be reconstructed. Thanks to the multilayer graphene structure and low absorption TOPAS, the graphene metasurface exhibits a broad bandwidth of 0.26 and 0.17 THz, respectively, in the band of 1 THz and 2.5 THz. The working state of the circularly polarized antenna and linearly polarized antenna can be switched in the bands around 1 THz (0.7–0.75 THz, 0.96–1.04 THz) and 2.5 THz (2.42–2.52 THz), respectively, without changing the physical geometry. Moreover, the graphene antenna, metasurface, and hybrid structure are tested, respectively, to verify that the components do not interfere with each other in performance. The hybrid antenna shows great potential in tunable terahertz devices and related applications.

中文翻译：

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基于石墨烯超表面和TOPAS的双频偏振可重构太赫兹天线


设计并研究了一种混合双频极化可重构太赫兹天线。石墨烯和TOPAS分别用作偏振转换超表面和介电基板，实现可调谐偏振转换和圆偏振。由于其低吸收率，TOPAS 是宽带太赫兹元件的良好衬底材料。通过在0 eV和0.5 eV之间调整石墨烯的化学势，可以重建1 THz（0.76-1.02 THz）和2.5 THz（2.43-2.6 THz）波段的偏振态。由于多层石墨烯结构和低吸收TOPAS，石墨烯超表面在1 THz和2.5 THz频段分别表现出0.26和0.17 THz的宽带宽。圆极化天线和线极化天线的工作状态可以分别在1 THz（0.7-0.75 THz、0.96-1.04 THz）和2.5 THz（2.42-2.52 THz）左右的频段切换，而无需改变物理几何结构。此外，分别对石墨烯天线、超表面和混合结构进行了测试，以验证组件在性能上不会相互干扰。混合天线在可调谐太赫兹设备和相关应用中显示出巨大的潜力。