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5 November 2020 Dual-tunable metamaterial absorber based on solid ion gel-graphene sandwich structure
Lixiang Yao, Yuanlong Liang, Xianjun Huang, Shanrong Hu, Kai Cheng, Jibin Liu
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Proceedings Volume 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics; 115650L (2020) https://doi.org/10.1117/12.2576487
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China
Abstract
Electrically tunable metamaterial is attracting extensive attention recently for its potential in electromagnetic compatibility (EMC) and radar scattering manipulation, while still remains a great deal of challenges in its tunability. In this paper, a conductivity tunable graphene-ion gel-graphene (GIG) sandwich structure is fabricated and measured to investigate the properties of ion gel, showing its advantages over ion liquid on flexibility and tunability. Besides, a frequency and amplitude dual-tunable metamaterial absorber based on the GIG sandwich structure is proposed, modeled and optimized. From the simulated response, the absorber can achieve the tuning of absorption frequency from 5.4 GHz to 7.1 GHz and the reflection minimum from -15 dB to -45 dB. With the introduction of tunability from varactor diodes and graphene, the working frequency and absorption can be almost independently tuned. This work gives a meaningful reference for graphene based tunable metamaterial based on solid ion gel, especially in conformal and outdoor environment applications.
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Lixiang Yao, Yuanlong Liang, Xianjun Huang, Shanrong Hu, Kai Cheng, and Jibin Liu "Dual-tunable metamaterial absorber based on solid ion gel-graphene sandwich structure", Proc. SPIE 11565, AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics, 115650L (5 November 2020); https://doi.org/10.1117/12.2576487
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KEYWORDS
Graphene
Ions
Absorption
Metamaterials
Solids
Liquids
Diodes
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