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arXiv 0807.2474cond-mat.mtrl-sci
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超材料的强抗磁响应

Strong diamagnetic response of metamaterials

E. N. Economou, Th. Koschny, C. M. Soukoulis

摘要:

我们证明,有一个强大的抗磁响应的超材料,包括开放或封闭的开口环谐振器(SRRs)。详细的数值工作表明,对于密集堆积的SRR的磁导率,$μ(ω)$,不接近单位,如预期的频率低于和高于谐振频率,$ω_0$。低于$ω_0$时,$μ(ω)$给出的值范围为0.9至0.6,取决于金属环的宽度,而高于$ω_0$时,$μ(ω)$接近0.5。封闭环在宽频率范围内具有$μ\approx 0.5$,与环的宽度无关。一个简单的模型,使用内部和外部的电流回路的SRR可以很容易地解释这种强的抗磁响应,这可以用于磁悬浮理论。

英文摘要:

We demonstrate that there is a strong diamagnetic response of metamaterials, consisting of open or closed split ring resonators (SRRs). Detailed numerical work shows that for densely packed SRRs the magnetic permeability, $μ(ω)$, does not approach unity, as expected for frequencies lower and higher than the resonance frequency, $ω_0$. Below $ω_0$, $μ(ω)$ gives values ranging from 0.9 to 0.6 depending of the width of the metallic ring, while above $ω_0$, $μ(ω)$ is close to 0.5. Closed rings have $μ\approx 0.5$ over a wide frequency range independently of the width of the ring. A simple model that uses the inner and outer current loop of the SRRs can easily explain theoretically this strong diamagnetic response, which can be used in magnetic levitation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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