Optical-magnetism-induced transparency in a metamaterial
Optical-magnetism-induced transparency in a metamaterial
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超材料中的光磁诱导透明度
DOI：
10.1103/physrevb.87.125136
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发表时间：
2013-03
影响因子：
3.7
通讯作者：
Wang, Mu
中科院分区：
文献类型：
--
作者：
Qin, Ling;Zhang, Kun;Peng, Ru-Wen;Xiong, Xiang;Zhang, Wei;Huang, Xian-Rong;Wang, Mu
在这篇文章中，我们从理论上证明了由超分子组成的超材料中的光磁可以诱导电磁透明。每个元分子包括一个金属裂环谐振器，作为一个明亮的元原子(具有光学磁性)，以及一个切割线对，作为一个暗元原子(具有光学无磁性)。研究发现，由于“亮”元原子和“暗”元原子之间的局域磁相互作用，在光学频率处发生磁共振；此后，在原始吸收背景上出现一个透明窗口。这种现象类似于原子三能级系统中的电磁感应透明(EIT)，并给出了一幅微观图像，将其与EIT进行了比较。此外，这种超材料的低损耗和慢光也得到了验证。这些研究可能在集成光路上实现潜在的应用。
In this paper, we theoretically demonstrate that electromagnetic transparency can be induced by optical magnetism in a metamaterial, which is composed of metamolecules. Each metamolecule consists of a metallic split-ring resonator, as one bright meta-atom (which is optically magnetic), and also a cut-wire pair, as one dark meta-atom (which is optically nonmagnetic). It is found that magnetic resonances occur at optical frequencies due to the local magnetic interaction between “bright” meta-atoms and “dark” meta-atoms; thereafter, a transparency window emerges upon the original absorption background. The phenomenon is similar to the electromagnetically induced transparency (EIT) in atomic three-level systems, and a microscopic picture is given to compare it with the EIT. Furthermore, low loss and slow light in this metamaterial have also been verified. The investigations may achieve potential applications on integrated optical circuits.