Dong Zheng-Gao, Lei Shuang-Ying, Xu Ming-Xiang, Liu Hui, Li Tao, Wang Fu-Ming, Zhu Shi-Ning
Physics Department, Southeast University, Nanjing 211189, People's Republic of China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2008 May;77(5 Pt 2):056609. doi: 10.1103/PhysRevE.77.056609. Epub 2008 May 29.
We numerically investigate the negative index of refraction in a metamaterial composed of metallic split-ring resonators, which exhibits simultaneously negative permittivity and permeability without resorting to additional metallic wires. It is confirmed that, in the left-handed band, negative permittivity is generated in analogy to the cut-wire metamaterial and negative permeability comes from the antisymmetric resonant mode, which occurs at a frequency band about 3 times higher than the fundamental magnetic resonance proposed by Pendry [IEEE Trans. Microwave Theory Tech. 47, 2075 (1999)].
我们通过数值方法研究了由金属开口环谐振器组成的超材料中的负折射率，该超材料在不借助额外金属线的情况下同时呈现负介电常数和负磁导率。结果证实，在左手频段，负介电常数的产生类似于切割线超材料，而负磁导率则源于反对称谐振模式，该模式出现在比彭德里提出的基本磁共振频率高约3倍的频段 [《IEEE 微波理论与技术汇刊》47, 2075 (1999)]。
