Free control of far-field scattering angle of transmission terahertz wave using multilayer split-ring resonators’ metasurfaces |
| |
Authors: | Ying Tian Xufeng Jing Haiyong Gan Chenxia Li Zhi Hong |
| |
Institution: | 1. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China2. National Institute of Metrology, Beijing 102200, China |
| |
Abstract: | To enhance transmission efficiency of Pancharatnam–Berry (PB) phase metasurfaces, multilayer splitring resonators were proposed to develop encoding sequences. As per the generalized Snell’s law, the deflection angle of the PB phase encoding metasurfaces depends on the metasurface period’s size. Therefore, it is impossible to design an infinitesimal metasurface unit; consequently, the continuous transmission scattering angle cannot be obtained. In digital signal processing, this study introduces the Fourier convolution principle on encoding metasurface sequences to freely control the transmitted scattering angles. Both addition and subtraction operations between two different encoding sequences were then performed to achieve the continuous variation of the scattering angle. Furthermore, we established that the Fourier convolution principle can be applied to the checkerboard coded metasurfaces. |
| |
Keywords: | metamaterial metasurface scattering Fourier convolution |
|
| 点击此处可从《Frontiers of Physics》浏览原始摘要信息 |
| 点击此处可从《Frontiers of Physics》下载免费的PDF全文 |