Rotated Pillars for Functional Integrated On‐Chip Terahertz Spoof Surface‐Plasmon‐Polariton Devices
Ying Zhang, Yongchang Lu, Mingrui Yuan, Yuehong Xu, Quan Xu, Quanlong Yang, Yingkai Liu, Jianqiang Gu, Yanfeng Li, Zhen Tian, Chunmei Ouyang, Weili Zhang, Jiaguang Han
Abstract
Abstract Spoof surface plasmon polaritons (SPPs) with strong subwavelength field confinement and enhancement offer a promising way for realizing integrated on‐chip terahertz (THz) devices. How to find a simple way to control the dispersion of spoof SPPs and then achieve functional on‐chip devices is thus highly desired. Here, the authors theoretically and experimentally demonstrate that such a method can provide sufficient design degrees of freedom to enable versatile THz spoof SPP metadevices. As a proof‐of‐concept demonstration, a series of on‐chip meta‐devices including the switch, the wavelength demultiplexer, and the splitters are presented. The proposed strategy paves a simple way toward the integrated on‐chip THz devices with various functionalities.