Peng Liang, Ran Lixin, Chen Hongsheng, Zhang Haifei, Kong Jin Au, Grzegorczyk Tomasz M
Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China.
Phys Rev Lett. 2007 Apr 13;98(15):157403. doi: 10.1103/PhysRevLett.98.157403. Epub 2007 Apr 12.
We demonstrate that by utilizing displacement currents in simple dielectric resonators instead of conduction currents in metallic split-ring resonators and by additionally exciting the proper modes, left-handed properties can be observed in an array of high dielectric resonators. Theoretical analysis and experimental measurements show that the modes, as well as the subwavelength resonance, play an important role in the origin of the left-handed properties. The proposed implementation of a left-handed metamaterial, based on a purely dielectric configuration, opens the possibility of realizing media at terahertz frequencies since scaling issues and losses, two major drawbacks of metal-based structures, are avoided.
我们证明，通过在简单介质谐振器中利用位移电流而非金属裂环谐振器中的传导电流，并额外激发适当的模式，可以在高介电常数谐振器阵列中观察到左手特性。理论分析和实验测量表明，这些模式以及亚波长共振在左手特性的起源中起着重要作用。所提出的基于纯介质结构的左手超材料的实现方式，由于避免了基于金属的结构的两个主要缺点——缩放问题和损耗，从而开启了在太赫兹频率下实现介质的可能性。
