Investigation of interface states in single-negative metamaterial layered structures based on the phase properties.
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.
Laboratory of Quantum Information Technology, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.
Jian
J
Zheng
Yihang
Y
Chen
Zefeng
Z
Chen
Xinggang
X
Wang
Peng
P
Han
Zehui
Z
Yong
Yu
Y
Wang
Chi Wah
CW
Leung
Costas M
CM
Soukoulis
D003198:Computer Simulation; D008027:Light; D008420:Manufactured Materials; D008962:Models, Theoretical; D044367:Phase Transition; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation