Manipulation of the terahertz leaky wave by metal–dielectric–metal metasurface. (20th June 2019)

• Record Type: Journal Article
• Authors: Cheng, Qingqing; Zhang, Chaoshi; Yu, Dong; Chen, Lin; Xie, Jingya; Zang, Xiaofei; Shkurinov, Alexander; Zhu, Yiming; Zhuang, Songlin
• Is Part Of: Applied physics express. Volume 12:Number 7(2019)
• Publication Date: 2019-06-20
• Subjects: leaky wave -- metasurface -- coupled-mode theory -- terahertz; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab27d1
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We experimentally demonstrated the properties of leaky waves generated inside the air gap between a high-index prism and a metal–dielectric–metal metasurface can be strongly engineered by the geometrical parameters of the metasurface. In particular, we further identified that the excited leaky waves undergo a transition from an over-coupled state to an under-coupled state along with the variation of structure parameters, manifest in their strongly engineered optical responses. These experimental findings can be well explained by the coupled-mode theory, and may have potential implementation in sensitive sensors and detections based on leaky waves.