Superlattice bilayer metasurfaces simultaneously supporting electric and magnetic Fano resonances
Superlattice bilayer metasurfaces simultaneously supporting electric and magnetic Fano resonances
复制标题
超晶格双层超表面同时支持电和磁法诺共振
DOI：
10.1364/ome.9.000944
复制
发表时间：
2019
影响因子：
2.8
通讯作者：
Deng Zi Lan
中科院分区：
文献类型：
--
作者：
Fu Tao;Gao Xi;Xia Gongli;Sun Tangyou;Li Qi;Zhang Fabi;Chen Yonghe;Li Haiou;Deng Zi Lan
在本文中，我们展示了一个Fano共振超晶格超颖表面结构组成的双层三聚体金属条纹在每个单元格。它可以同时支持两种类型的Fano谐振，分别在微波频率下具有电和磁特性。电Fano共振是由反相电模与同相电模相互干扰而产生的，而磁Fano共振则是由双层超颖表面各层中的反相电模与差距区域中的磁模相互干扰而产生的.此外，通过调节复合结构中的各种距离自由度，可以容易地调谐双Fano共振。我们提出的模型不仅提供了一种可能性，以刺激和控制电和磁Fano共振同时微波，但也有很大的潜力，生物传感和开关应用，甚至更高的频率范围，如太赫兹或光学区域。
In this paper, we demonstrated a Fano resonant superlattice metasurface structure composed of bilayer trimeric metallic stripes in each unit cell. It can simultaneously support two types of Fano resonances, which individually possesses electric and magnetic properties at microwave frequencies, respectively. The electric Fano resonance is generated by the anti-phase electric mode interfering with in-phase electric mode, while the magnetic Fano resonance stems from the interference between the magnetic modes in the gap area and the anti-phase electric mode in each layer of the bilayer metasurface. In addition, the double Fano resonances are readily tunable by adjusting a variety of distance degrees of freedom in the composite structure. Our proposed model not only provides a possibility to stimulate and control electric and magnetic Fano resonances simultaneously for microwaves, but also holds great potential for biosensing and switching applications for even higher frequency range such as terahertz or optical region.