Guo Yunsheng, Zhou Ji
1] State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China [2] Department of Physics, Inner Mongolia University of Science and Technology, Baotou 014010, China.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Sci Rep. 2015 Jan 30;5:8144. doi: 10.1038/srep08144.
In classical mechanics, it is well known that a system consisting of two identical pendulums connected by a spring will steadily oscillate with two modes: one at the fundamental frequency of a single pendulum and one in which the frequency increases with the stiffness of the spring. Inspired by this physical concept, we present an analogous approach that uses two metamaterial resonators to realize dual-band-enhanced transmission of microwaves through a subwavelength aperture. The metamaterial resonators are formed by the periodically varying and strongly localized fields that occur in the two metal split-ring resonators, which are placed gap-to-gap on either side of the aperture. The dual-band frequency separation is determined by the coupling strength between the two resonators. Measured transmission spectra, simulated field distributions, and theoretical analyses verify our approach.
在经典力学中，众所周知，由通过弹簧连接的两个相同摆锤组成的系统将以两种模式稳定振荡：一种是单个摆锤的基频模式，另一种是频率随弹簧刚度增加的模式。受此物理概念的启发，我们提出了一种类似的方法，该方法使用两个超材料谐振器来实现微波通过亚波长孔径的双频增强传输。超材料谐振器由两个金属裂环谐振器中出现的周期性变化且高度局域化的场形成，这两个金属裂环谐振器间隙对间隙地放置在孔径的两侧。双频频率间隔由两个谐振器之间的耦合强度决定。测量的传输光谱、模拟的场分布和理论分析验证了我们的方法。
