Abstract

In this paper, a broadband terahertz metasurface dedicated to cross-polarization conversion was designed, fabricated, and assessed. The metasurface, comprising two nested double-split rings, features an inherent insensitivity to the angle of incidence. Simulations reveal that the converter achieves a ${\gt}{99}\%$ polarization conversion efficiency across the 90–140 GHz range. Moreover, it maintains a ${\gt}{90}\%$ polarization conversion ratio (PCR), even at a 50° incidence angle. The sample, featuring ${50} \times {70}$ arrays, was fabricated, and the relevant experimental results align closely with the simulated outcomes. The metasurface characteristics can markedly enhance the performance of cross-polarization converters operating in the terahertz range.

© 2024 Optica Publishing Group

Graphene-based metasurface for a tunable broadband terahertz cross-polarization converter over a wide angle of incidence

Vinit Singh Yadav, Sambit Kumar Ghosh, Somak Bhattacharyya, and Santanu Das
Appl. Opt. 57(29) 8720-8726 (2018)

Broadband tunable terahertz polarization converter based on a sinusoidally-slotted graphene metamaterial

Jianfeng Zhu, Shufang Li, Li Deng, Chen Zhang, Yang Yang, and Hongbo Zhu
Opt. Mater. Express 8(5) 1164-1173 (2018)

Multi-functional terahertz metasurface for a vortex beam, multi-channel focusing, polarization conversion, and broadband absorption based on vanadium dioxide

XiangZhong Li, Wei Wei, and XiuDan Yang
Appl. Opt. 63(7) 1695-1701 (2024)

Multifunction and switchable hybrid metasurface based on graphene and gold

Muhammad Sajjad, Xiangkun Kong, Shaobin Liu, and Muhammad Irshad Khan
Appl. Opt. 63(12) 3099-3107 (2024)

Ultra-broadband wide-angle linear polarization converter based on H-shaped metasurface

Jin Xu, Rongqiang Li, Jin Qin, Shenyun Wang, and Tiancheng Han
Opt. Express 26(16) 20913-20919 (2018)