一种基于电耦合的电磁诱导透明超材料

摘要

A high transmission metamaterial of electromagnetical induced transparency (EIT) was designed based on electric coupling between two resonant structures which was obtained by the electromagnetic excitation of bright mode on dark mode.At the same time,these two modes operated at the same frequency but with different Q factors.Because of the short distance and high electric coupling between the bright mode and dark mode,a novel EIT phenomenon can be achieved at the same resonant frequency.Finally,a transparency window was achieved at 5.31 GHz with a transmission level as high as 0.85,whose working mechanism was analyzed by the surface currents distributions,the electric and magnetic field distributions.The proposed EIT metamaterial offers a latent application value to produce antenna housings with high performance.%利用两种谐振结构之间的电耦合,设计了一种可以实现电磁诱导透明现象的新颖电磁超材料.该超材料通过将工作于同一谐振点(5.21 GHz)、不同品质因数(Q值)的金属谐振结构组合在一起,利用两者之间的近距离、高耦合实现了“亮模型”对“暗模型”的激励,从而实现了位于5.31 GHz处的诱导透明窗口,透射峰值达到0.85.并且从透射参数、表面电流、电磁场分布等方面分析了其工作机制.这种超材料在实现高性能微波天线罩等方面有着潜在的应用价值.