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首页> 外文期刊>Plasmonics >The Filter Characteristic Research of Metal-Insulator-Metal Waveguide with Double Overlapping Annular Rings
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The Filter Characteristic Research of Metal-Insulator-Metal Waveguide with Double Overlapping Annular Rings

机译：双环环形金属-绝缘体-金属波导的滤波特性研究

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摘要

A metal-insulator-metal (MIM) waveguide with double overlapping annular rings is proposed, and its transmission properties are simulated and characterized by the finite element method. The results show that the transmission valley appears in the transmission spectra when the straight MIM waveguide output port has a positional angular deviation theta relative to the incident port. Compared with the symmetric structure (theta = 0A degrees), the filtering properties of the asymmetric structures (theta > 0A degrees) are greatly improved. And compared to the MIM waveguide with single ring resonator, the filter characteristic of MIM waveguide with the double overlapping rings is superior to that of single ring resonator. For the asymmetric structure, due to the fact that parts of coupled MIM waveguide output port locates at the magnetic nodes of the standing waves in the ring resonator, there is a transmission minimum. Moreover, the asymmetric MIM waveguide can easily detect the refractive index changes of the filled media inside of resonator cavities, its potential applications in sensors.
机译：提出了具有双重叠环形环的金属-绝缘体-金属（MIM）波导，并通过有限元方法对其传输特性进行了仿真和表征。结果表明，当直线MIM波导输出端口具有相对于入射端口的位置角度偏差theta时，透射波谷出现在透射光谱中。与对称结构（θ= 0A度）相比，非对称结构（θ> 0A度）的滤波特性得到了极大的改善。并且与具有单环谐振器的MIM波导相比，具有双重叠环的MIM波导的滤波特性要优于单环谐振器。对于非对称结构，由于耦合的MIM波导输出端口的一部分位于环形谐振器中驻波的磁节点处，因此存在传输最小值。此外，非对称MIM波导可以轻松检测谐振腔内填充介质的折射率变化，其在传感器中的潜在应用。

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