Refractive Index and Alcohol-Concentration Sensor Based on Fano Phenomenon.
Refractive Index and Alcohol-Concentration Sensor Based on Fano Phenomenon.
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基于Fano现象的折射率和酒精浓度传感器
DOI：
10.3390/s22218197
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发表时间：
2022-10-26
期刊：
影响因子：
--
通讯作者：
Ren Y
中科院分区：
文献类型：
--
作者：
Wang Q;Yan S;Liu J;Zhang X;Shen L;Liu P;Cui Y;Li T;Ren Y
提出了一种基于法诺共振现象的新型纳米折射率传感器。该传感器由金属-绝缘体-金属（MIM）波导和带槽的v形环腔（VRCG）组成。利用有限元方法对纳米传感器的性能进行了分析。仿真结果表明，几何结构本身的不对称性是导致法诺共振分裂的主要因素。在Fano分割模式下，在传感器灵敏度略有降低的情况下，系统的Fano带宽可以显著降低，从而大幅度提高传感器的性能值（FOM）。基于以上优点，本文传感器的灵敏度高达2765 nm/RIU， FOM = 50.28。此外，我们进一步将该传感器应用于酒精浓度检测。效果良好，灵敏度达到150左右。这种传感器在溶液浓度的精确测量中具有广阔的应用前景。
A novel nano-refractive index sensor based on the Fano resonance phenomenon is proposed in this paper. The sensor consists of the metal-insulator-metal (MIM) waveguide and a V-ring cavity with a groove (VRCG). We analyzed the performance of the nanoscale sensor using the finite element method. The simulation results show that the asymmetry of the geometric structure itself is the main factor leading to Fano resonance splitting. In Fano splitting mode, the Fano bandwidth of the system can be significantly reduced when the sensor sensitivity is slightly reduced, so that the figure of merit (FOM) of the sensor can be substantially improved. Based on the above advantages, the sensor’s sensitivity in this paper is as high as 2765 nm/RIU, FOM = 50.28. In addition, we further applied the sensor to alcohol concentration detection. The effect is good, and the sensitivity achieves about 150. This type of sensor has a bright future in the precision measurement of solution concentrations.
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