Tunable Fano resonance in plasmonic MDM waveguide with a square type split-ring resonator
Tunable Fano resonance in plasmonic MDM waveguide with a square type split-ring resonator
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DOI：
10.1016/j.ijleo.2018.06.027
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发表时间：
2018-01-01
期刊：
影响因子：
3.1
通讯作者：
Yang, Rongcao
中科院分区：
文献类型：
--
作者：
Yi, Xingchun;Tian, Jinping;Yang, Rongcao
提出了具有劈裂环谐振器（SRR）或互补劈裂环谐振器（CSRR）的等离子体金属-介电-金属（MDM）型波导结构。波导可以支持范诺型传输。在SRR结构中，除了对称的整数模态外，还可以激发非对称的非整数模态。仿真结果表明，通过改变分裂的位置和其他参数可以有效地调谐透射光谱。然而，对于对称的CSRR结构，非整数模态不能被激发。采用有限元法对该结构的传输特性进行了数值研究。所提出的结构在等离子体滤光器、折射率纳米传感器、集成慢光器件等领域具有潜在的应用前景。
Plasmonic metal-dielectric-metal (MDM) type waveguide structures with a split ring resonator (SRR) or a complementary split-ring resonator (CSRR) are proposed. The waveguides can support Fano type transmission. It is observed that the asymmetric non-integer modes in addition to the symmetric integer modes can be excited in the SRR structure. Simulation results indicate that the transmission spectra can be efficiently tuned by changing the position of the split as well as other parameters. However, for the symmetrical CSRR structure, the non-integer modes can not be excited. The transmission properties of the proposed structure are numerically studied by the finite element method (FEM). The proposed structures have potential application in the area of the plasmonic filter, the refractive index nanosensor, the integrated slow-light devices, and so on.