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Angular modulation of terahertz wavefront scattering based on all-silicon dielectric coded metasurface grating

SIQI SHI1, KAI YANG1,* , XUFENG JING1

Affiliation

  1. Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, China

Abstract

In order to simplify the design and fabrication difficulties, and to improve the efficiency of the transmission device, we designed an all-silicon monolayer coded metasurface grating. The single layer coded metasurface is composed of circular hole elements with different sizes. Based on the generalized Snell's law, we can know that the far-field scattering angle of the coded metasurface depends on the coding period. If we want to get different scattering angles, we need to design different coding periods. In general, the traditional coded metasurface sequence cannot realize the continuous control of the scattering angle. Here, by addition and subtraction of the coded sequence, a new coded metasurface sequence is obtained, and a new scattering angle is obtained. Through the addition and subtraction operations of coded metasurface sequences, we can obtain the flexible control of scattering angle without redesigning the coding unit..

Keywords

Metasurface, Encoding sequence, Grating.

Submitted at: June 3, 2021
Accepted at: April 8, 2022

Citation

SIQI SHI, KAI YANG, XUFENG JING, Angular modulation of terahertz wavefront scattering based on all-silicon dielectric coded metasurface grating, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 3-4, pp. 91-100 (2022)