Liquid crystal-based terahertz programmable metasurface with Fano resonance for two-dimensional beam steering

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-01-03 DOI:10.1016/j.optcom.2025.131483

Chenxi Liu , Fei Yang , Jiangtao Ji , Xiaojian Fu , Jun Yang , Shuang Peng

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引用次数: 0

Abstract

Recently, Reconfigurable Intelligent Surfaces (RIS) have attracted considerable attention among researchers, especially in their applications within the terahertz domain. In this paper, we propose a method to reduce the ratio of unit cells’ size to wavelength by inducing Fano resonances with asymmetric structures and realizing the two-dimensional (2D) beam steering with the reduced-size unit cells. The smaller size of the unit cells allows the sub-array to have enough room for the decoupling structure and bias lines and facilitates the implementation of beam steering in two dimensions. Based on this, a liquid-crystal (LC)-integrated terahertz (THz) reflective programmable metasurface at 0.216 THz is designed, manufactured, and measured. The measured results demonstrate that the metasurface can realize the 2D beam steering function and are in good agreement with the simulation results. This study creatively proposes a new application of asymmetric structures in phase modulation of terahertz waves, thereby significantly reducing the ratio of unit cells’ size to wavelength, and providing much freedom in the metasurface design. It is believed this study has potential applications in imaging, terahertz wireless communication, radar, and related fields.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.