Magnetically tunable Mie resonance-based dielectric metamaterials.

Magnetically tunable Mie resonance-based dielectric metamaterials.
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基于米氏共振的磁可调介电超材料

DOI:
10.1038/srep07001
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发表时间:
2014-11-11
期刊:
影响因子:
4.6
通讯作者:
Zhou J
Zhou J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bi K;Guo Y;Liu X;Zhao Q;Xiao J;Lei M;Zhou J

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具有可调磁导率和介电常数的电磁材料对于无线通信和雷达技术来说是非常理想的。然而,电磁参数的可调性对传统材料和超材料来说是一个巨大的挑战。在这里,我们展示了一种基于磁可调谐米氏共振的介电超材料。磁可调特性源自介电立方体的米氏共振和铁氧体长方体的铁磁进动的耦合。模拟和实验结果都表明,可以通过改变施加的磁场来调节超材料的有效磁导率和介电常数。这种机制为构建具有大可调范围和通过超材料路线定制的巨大潜力的微波器件提供了一种有前景的方法。
Electromagnetic materials with tunable permeability and permittivity are highly desirable for wireless communication and radar technology. However, the tunability of electromagnetic parameters is an immense challenge for conventional materials and metamaterials. Here, we demonstrate a magnetically tunable Mie resonance-based dielectric metamaterials. The magnetically tunable property is derived from the coupling of the Mie resonance of dielectric cube and ferromagnetic precession of ferrite cuboid. Both the simulated and experimental results indicate that the effective permeability and permittivity of the metamaterial can be tuned by modifying the applied magnetic field. This mechanism offers a promising means of constructing microwave devices with large tunable ranges and considerable potential for tailoring via a metamaterial route.
DOI: 10.1002/adma.200702624
发表时间: 2008-06-04
期刊: ADVANCED MATERIALS
影响因子: 29.4
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