Ultra‐Wideband Transmissive Programmable Metasurface Enabled Near‐Field Holography and Far‐Field OAM Generation

IF 10 1区 物理与天体物理 Q1 OPTICS
Longpan Wang, Zhenyuan Li, Yuhua Chen, Xudong Bai, Zhenfei Li, Fuli Zhang, Xuetao Gan
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引用次数: 0

Abstract

Transmissive programmable metasurface can offer notable benefits for the precise agile manipulation of electromagnetic (EM) waves, which is a promising candidate for radar detection, wireless communications, and spectral imaging. However, most previous studies typically face the challenge of narrow bandwidth and are constrained by relatively simple and single functionality. Here, an ultra‐wideband (UWB) transmissive programmable metasurface is proposed to conduct agile multifunctional EM modulation. The meta‐atom is designed with a butterfly‐shaped configuration and manipulated using two pin diodes, demonstrating high‐efficiency transmission with low insertion loss less than 1 dB and stable phase difference of 180° from 15.77 to 28.59 GHz, ranging from Ku to Ka‐band with a fractional bandwidth up to 57.7%. The transmissive programmable metasurface is further constructed, and its effectiveness for multifunctional EM modulation is verified both numerically and experimentally, which can conduct different functionalities, including near‐field holographic imaging at lower‐frequency Ku‐band and far‐field high‐purity orbital angular momentum (OAM) generation at higher‐frequency Ka‐band. The proposed strategy may enrich the functionalities of programmable metasurfaces, as well as open a new pathway toward UWB multifunctional applications.
超宽带传输可编程超表面支持近场全息和远场OAM生成
传输可编程超表面可以为精确灵活地操纵电磁波提供显着的好处,这是雷达探测,无线通信和光谱成像的有前途的候选者。然而,以往的研究大多面临窄带带宽的挑战,且受限于相对简单单一的功能。本文提出了一种超宽带(UWB)传输可编程元表面,用于实现敏捷的多功能电磁调制。该元原子被设计成蝴蝶形结构,并使用两个引脚二极管进行操纵,显示出高效率的传输,插入损耗低,小于1 dB,相位差在15.77至28.59 GHz范围内稳定在180°,从Ku到Ka波段,分数带宽高达57.7%。进一步构建了传输可编程超表面,并通过数值和实验验证了其多功能EM调制的有效性,该超表面可以实现不同的功能,包括低频Ku波段的近场全息成像和高频Ka波段的远场高纯度轨道角动量(OAM)生成。提出的策略可以丰富可编程元表面的功能,并为超宽带多功能应用开辟新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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