Terahertz Dual-Band Dual-Polarization 3-Bit Coding Metasurface for Multiple Vortex Beams Generation

Author:

Tang Pengcheng1,Zheng Xueqi1,Ma Tianyu1,Cheng Gong1,Wu Genhao1,Bao Xiue1ORCID,Sun Houjun1,Ding Jun2,Si Liming1ORCID

Affiliation:

1. Beijing Key Laboratory of Millimeter Wave and Terahertz Technology, School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China

2. State Key Laboratory of Precision Spectroscopy, Key Laboratory of Polar Materials and Devices, School of Physics and Electronic Sciences, East China Normal University, Shanghai 200241, China

Abstract

Terahertz technology and vortex beams have demonstrated powerful capabilities in enhancing the channel capacity of communication systems. This work proposes a design strategy of dual-band and dual-function 3-bit coding metasurface based on beam polarization characteristics. The unit cell of the metasurface is composed of two pattern structures, which has the ability to flexibly and independently control the reflection phases of incident plane wave at two frequency bands. The metasurface designed in this work is a combination of two patterns according to the addition operation and the convolution operation. The 3-bit coding metasurface generates two orbital angular momentum (OAM) beams with a deflection of 12.1° with modes l1=+1 and l2=−1 under the y-polarized incidence at 0.6 THz. Similarly, the designed metasurface produces two OAM beams with a deflection of 16.5° under the incidence of x-polarized wave at 0.9 THz, and the modes are l3=+1 and l4=−2. The full-wave simulation results agree well with the theoretical predictions, which could prove the correctness and effectiveness of the proposed method. The metasurface designed according to this method has potential applications in multiple-input multiple-output (MIMO) communication systems.

Funder

Beijing Natural Science Foundation of China–Haidian Original Innovation Joint Fund

National Key R&D Program of China

National Natural Science Foundation of China

National Program on Key Basic Research Project

Beijing Natural Science Foundation

Open Research Fund of State Key Laboratory of Space-Ground Integrated Information Technology

Basic Research Foundation of Beijing Institute of Technology, China

111 Project of China

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Computer Networks and Communications,Hardware and Architecture,Signal Processing,Control and Systems Engineering

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