Polarization-insensitive, frequency- and amplitude-tunable transparent microwave absorber based on graphene metasurface

被引:3
|
作者
Wang, Pan [1 ]
Tao, Hui [1 ]
Han, Wenlong [1 ]
Zhang, Canran [1 ]
Xu, Yijing [1 ]
Wang, Qilong [1 ]
机构
[1] Southeast Univ, Sch Elect Sci & Engn, Nanjing 210096, Peoples R China
基金
中国国家自然科学基金;
关键词
OPTICALLY TRANSPARENT; DESIGN; MODULATION; BANDWIDTH;
D O I
10.1063/5.0187194
中图分类号
O59 [应用物理学];
学科分类号
摘要
Transparent and flexible metamaterial absorbers can provide solutions for electromagnetic compatibility and electromagnetic radiation pollution. They also play key roles in platforms with optical windows that require low detectability and immunity to electromagnetic interference. Due to the lack of active adaptability to complex electromagnetic environments, early metamaterial absorbers need to be redesigned and manufactured once the application scenarios change. The new two-dimensional material graphene provides a practical technical approach for the realization of transparent tunable absorbers. In this work, we propose a polarization-insensitive dual-tunable microwave absorber based on graphene metasurface. By controlling two separate bias voltages applied to patterned graphene or continuous graphene, independent dynamic regulation of electromagnetic wave absorption frequency and amplitude is achieved. It also possesses the features of optical transparency and flexibility. The measurement results show that the absorption frequency can be shifted from 9.8 to 11.3 GHz, the peak absorption rate at each absorption frequency remains above 99.6%, and the reflection amplitude modulation can be achieved simultaneously at each absorption frequency. The proposed absorber integrates multiple modulation functions for electromagnetic waves, and the overall structure is optically transparent and flexible. Therefore, it can contribute to many practical wave absorbing applications.
引用
收藏
页数:12
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