Graphene‐Based Flexible Optically Transparent Dual‐Tunable Metasurface

Author:

Yang Fulong123ORCID,Xu Huan1,Zhu Xiaoqing1,Wang Dayu1,Zhang Yongxia1,Feng Zhe1

Affiliation:

1. College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou Gansu 730050 China

2. Tianshui Electric Drive Research Institute Co. Ltd Tianshui Gansu 741020 China

3. Department of Electrical Engineering and Information Engineering Lanzhou University of Technology Lanzhou Gansu 730050 China

Abstract

AbstractDynamically tunable flexible metasurfaces with optical transparency are essentially useful in stealth, electromagnetic sensing, and camouflage while keeping continuous optical observation and communication. In this paper, a dual‐tunable graphene‐based metasurface is designed based on patterned graphene sandwich structures, showing independent dynamic control of reflection amplitude and resonance frequency, excellent optical transparency, and outstanding flexibility. Both the simulated and measured results demonstrate that the transition from dual band absorption at 12 and 24.8 GHz to broad band absorption from 10 to 25.7 GHz, and the absorption amplitude can be tuned between −5 and −15 dB on average in each case dynamically and independently by applying bias voltage to graphene layers. Lastly, the distributions of the induced electric field and surface currents, as well as an equivalent circuit model, are provided to illustrate the tunable electromagnetic absorption mechanism. The designed metasurface has potential applications that are speculated in the fields of electromagnetic tune and electromagnetic stealth.

Funder

Natural Science Foundation of Gansu Province

National Natural Science Foundation of China

Publisher

Wiley

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