Department of Electromagnetic Field, Czech Technical University in Prague, 166 27-Prague, Czech Republic. l
J Phys Condens Matter. 2010 Jan 20;22(2):025902. doi: 10.1088/0953-8984/22/2/025902. Epub 2009 Dec 14.
It is shown that artificial magnetism with relatively large frequency bandwidth can be obtained from periodic arrangements of dielectric rings. Combined with dielectric rods, dielectric rings can provide 3D isotropic left-handed metamaterials which are an advantageous alternative to metallic split ring resonators (SRRs) and/or metallic wires when undetectability by low frequency external magnetic fields is desired. Furthermore it is shown that, unlike conventional SRRs, dielectric rings can also be combined with natural plasma-like media to obtain a left-handed metamaterial.
研究表明，通过周期性排列介质环可以获得具有较大频率带宽的人工磁体。结合介质棒，介质环可以提供 3D 各向同性左手超材料，在需要低频外部磁场不可检测时，这是金属分环谐振器 (SRR) 和/或金属线的有利替代方案。此外，与传统的 SRR 不同，介质环也可以与类似自然等离子体的介质结合，以获得左手超材料。
