A direct laser-synthesized magnetic metamaterial for low-frequency wideband passive microwave absorption
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Yihe Huang,
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Yize Li,
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Kewen Pan,
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Yixian Fang,
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Kai Chio Chan,
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Xiaoyu Xiao,
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Chao Wei,
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Kostya S Novoselov,
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John Gallop,
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Ling Hao,
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Zhu Liu,
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Zhirun Hu,
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Lin Li
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Abstract
A new metamaterial was demonstrated to absorb microwaves with 97.2%-;97.7% absorption within a wide bandwidth of 1.56 GHz-18.3 GHz.The material has achieved the highest relative bandwidth and lowest thickness in the L to S-band reported so far.The design of multiple-layer metamaterial structures was for wide bandwidth microwave absorption.A one-step laser direct writing method was demonstrated to synthesize graphene and magnetic nanoparticles simultaneously.The laser direct writing enabled the achievement of an electrical sheet resistance from 57 to 480 Ω sq−1 with a 5% deviation.
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