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arXiv 0907.3026physics.optics
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近红外开口环超材料阵列中的电、磁偶极耦合

Electric and magnetic dipole coupling in near-infrared split ring metamaterial arrays

I. Sersic, M. Frimmer, E. Verhagen, A. F. Koenderink

摘要:

我们提出了实验观察的强大的电磁相互作用的开口环谐振器(SRR)的超材料。我们制作了近红外(1.4 $μ$ m)平面超材料,沿不同方向具有不同的SRR间距。我们的传输测量显示蓝移和红移的磁共振,这取决于SRR相对于晶格的取向。位移同意与一个简单的模型,同时磁和电近场偶极耦合。我们还发现大的共振加宽,伴随着有效截面每SRR随着密度的增加而减少。这些效应是由超辐射散射引起的。我们的数据为洛伦兹-洛伦兹方法研究超材料提供了新的思路。

英文摘要:

We present experimental observations of strong electric and magnetic interactions between split ring resonators (SRRs) in metamaterials. We fabricated near-infrared (1.4 $μ$m) planar metamaterials with different inter-SRR spacings along different directions. Our transmission measurements show blueshifts and redshifts of the magnetic resonance, depending on SRR orientation relative to the lattice. The shifts agree well with a simple model with simultaneous magnetic and electric near-field dipole coupling. We also find large broadening of the resonance, accompanied by a decrease in effective cross section per SRR with increasing density. These effects result from superradiant scattering. Our data shed new light on Lorentz-Lorenz approaches to metamaterials.

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