Separately tuning of double Fano resonances in facile asymmetric slit metasurface
Separately tuning of double Fano resonances in facile asymmetric slit metasurface
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DOI：
10.35848/1882-0786/ab8966
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发表时间：
2020-05-01
影响因子：
2.3
通讯作者：
Muhammad, Naseer
中科院分区：
文献类型：
--
作者：
Fu, Tao;Liu, Fei;Muhammad, Naseer
本文提出了一种非对称三聚体狭缝超颖表面结构，其产生独立可调谐的双Fano共振（DFR），即Fano 1和Fano 2。严格的模拟和实验扫描近场表明，非辐射暗模式产生Fano 1，而磁环模式产生峰Fano 2。这两种Fano共振的机制表明，干涉场可以通过不同的几何参数独立调谐。在非对称缝隙元表面中同时产生DFR的单独调谐。这些结果暗示了Fano共振的潜在应用，如激光和传感。
An asymmetric trimeric slit metasurface structure is proposed herein, which generated independently tunable double Fano resonances (DFRs), namely, Fano1 and Fano2. Rigorous simulations and experimental scanning near-field demonstrated that the non-radiative dark mode produces Fano1, while the magnetic toroidal mode generates peak Fano2. The mechanisms of the two Fano resonances infer that interference fields can be independently tuned by different geometric parameters. The separate tuning of DFRs is simultaneously generated in the asymmetric slit metasurface. These results imply the potential applications of Fano resonances, such as lasing and sensing.