Manipulation of wave scattering by Fourier convolution operations with Pancharatnam-Berry coding metasurface

被引：30
|
作者：
Zhao, Tianqi [1 ]
Jing, Xufeng [1 ,2 ]
Tang, Xiaoyan [1 ,2 ]
Bie, Xun [1 ,2 ]
Luo, Tianzi [1 ,2 ]
Gan, Haiyong [3 ]
He, Yingwei [3 ]
Li, Chenxia [1 ]
Hong, Zhi [2 ]
机构：
[1] China Jiliang Univ, Inst Optoelect Technol, Hangzhou 310018, Peoples R China
[2] China Jiliang Univ, Ctr THz Res, Hangzhou 310018, Peoples R China
[3] Natl Inst Metrol, Beijing, Peoples R China
来源：
OPTICS AND LASERS IN ENGINEERING | 2021年 / 141卷
关键词：
Pancharatnam-Berry phase; Fourier convolution operations; Encoding metasurface; ORBITAL ANGULAR-MOMENTUM; METAMATERIALS; ANGLE; REFLECTION; GENERATION; DIFFRACTION; CONVERSION; GRATINGS;
D O I：
10.1016/j.optlaseng.2021.106556
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose an encoding metasurface with three-layers C-shaped unit cell structure. The transmission phase from 0 to 2 pi can be obtained by using different rotation angles of Pancharatnam-Berry encoding elements. The Pancharatnam-Berry encoding metasurfaces can generate different coding sequences to obtain various deflection angles. Importantly, Fourier convolution theory in digital signal processing system can be introduced into Pancharatnam-Berry encoding metasurfaces. New different encoding sequences can be acquired by Fourier convolution operation to flexibly control the terahertz scattering with arbitrary scattering angle. Thus, combining Pancharatnam-Berry encoding metasurfaces and Fourier convolution principle can simply realize the flexible control of terahertz scattering.
引用
收藏
页数：9
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