Zheng Jian, Chen Yihang, Chen Zefeng, Wang Xinggang, Han Peng, Yong Zehui, Wang Yu, Leung Chi Wah, Soukoulis Costas M
Laboratory of Quantum Information Technology, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.
Opt Express. 2013 Jul 15;21(14):16742-52. doi: 10.1364/OE.21.016742.
The physical mechanism of the interface states in layered structures consisting of single-negative metamaterials is investigated using a simple resonant cavity model. We found that the interface states and their corresponding tunneling transmission modes appeared when the resonant condition is satisfied. Such resonant condition depends on the phase changes inside the resonant cavity. Based on these results, we proposed an efficient method to precisely predict the frequencies of the tunneling interface states inside the single-negative metamaterial layers. Our method is effective for interface states corresponding to perfect or imperfect tunneling transmission. Composite right/left-handed transmission lines were used to realize the pair and sandwich metamaterial layered structures in the microwave region. Electromagnetic tunneling interface states were observed in the measurements, which agreed well with the theory. Our study offers a way for effectively designing metamaterial devices with novel electromagnetic tunneling properties.
利用一个简单的谐振腔模型研究了由单负超材料组成的分层结构中界面态的物理机制。我们发现，当满足谐振条件时，界面态及其相应的隧穿传输模式会出现。这种谐振条件取决于谐振腔内的相位变化。基于这些结果，我们提出了一种有效方法来精确预测单负超材料层内隧穿界面态的频率。我们的方法对于对应于完美或不完美隧穿传输的界面态是有效的。在微波区域，使用复合左右手传输线来实现双对和三明治超材料分层结构。在测量中观察到了电磁隧穿界面态，其与理论结果吻合良好。我们的研究为有效设计具有新型电磁隧穿特性的超材料器件提供了一种方法。
