Giant and controllable Goos—Hänchen shift of a reflective beam off a hyperbolic metasurface of polar crystals  

作　　者：薛天 李宇博 宋浩元 王相光 张强 付淑芳 周胜 王选章 Tian Xue;Yu-Bo Li;Hao-Yuan Song;Xiang-Guang Wang;Qiang Zhang;Shu-Fang Fu;Sheng Zhou;Xuan-Zhang Wang(Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,and School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China;Department of Basic Courses,Guangzhou Maritime University,Guangzhou 510725,China)

机构地区：[1]Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,and School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China [2]Department of Basic Courses,Guangzhou Maritime University,Guangzhou 510725,China

出　　处：《Chinese Physics B》2024年第1期428-435,共8页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Heilongjiang Province of China (Grant No.LH2020A014);the Graduate Students' Research Innovation Project of Harbin Normal University (Grant No.HSDSSCX2022-47)。

摘　　要：We conduct a theoretical analysis of the massive and tunable Goos–Hänchen(GH) shift on a polar crystal covered with periodical black phosphorus(BP)-patches in the THz range. The surface plasmon phonon polaritons(SPPPs), which are coupled by the surface phonon polaritons(SPh Ps) and surface plasmon polaritons(SPPs), can greatly increase GH shifts.Based on the in-plane anisotropy of BP, two typical metasurface models are designed and investigated. An enormous GH shift of about-7565.58 λ_(0) is achieved by adjusting the physical parameters of the BP-patches. In the designed metasurface structure, the maximum sensitivity accompanying large GH shifts can reach about 6.43 × 10^(8) λ_(0)/RIU, which is extremely sensitive to the size, carrier density, and layer number of BP. Compared with a traditional surface plasmon resonance sensor, the sensitivity is increased by at least two orders of magnitude. We believe that investigating metasurface-based SPPPs sensors could lead to high-sensitivity biochemical detection applications.

关 键 词：Goos–H?nchen shift black phosphorus surface plasmon phonon polaritons sensitivity metasurfaces 

分 类 号：O441.4[理学—电磁学]