| Cite this article as: Wang Ye-Zhuang,Shen Hong-Jun,Chen Jun-Kun,Wang Ya-Wen. Quadruple Fano Sensing Based on Three Rectangular Resonant Cavity Non pass MIM Wave guide [J]. J. At. Mol. Phys.(原子与分子物理学报), 2025, 42: 035002 (in Chinese) |
| Quadruple Fano Sensing Based on Three Rectangular Resonant Cavity Non pass MIM Wave guide |
| Hits 225 Download times 129 Received:September 20, 2023 Revised:September 28, 2023 |
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| DOI
10.19855/j.1000-0364.2025.035002 |
| Key Words
Metal-Insulator-Metal Sensor Resonant Cavity Fano resonance Sensitivity |
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| Abstract
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| In order to obtain a highly sensitive biosensor, in this paper, a non pass metal insulator metal (MIM) wave guide sensor that can excite quadruple Fano resonance is designed. The top and bottom symmetric structure is adopted, and a vertical rectangular cavity and two horizontal rectangular cavities interact with the bus wave guide to obtain the quadruple Fano resonance. The finite difference time domain (FDTD) method is used to calculate the transmission characteristics of the structure and the normalized magnetic field in the Z direction, and the mechanism of its Fano resonance is analyzed in detail. By calculating the transmission spectrum adjusted by the structural geometric parameters, it is obtained that the transmission and resonance position of the four Fano resonance peaks can be independently adjusted by changing the structural geometric parameters. In addition, it was found that adding different concentrations of glucose solutions to the structure can achieve high refractive index sensing sensitivity (S), the highest sensitivity can reach 2736.98nm/RIU, indicating that this structure has high sensitivity to changes in refractive index, This provides a new approach for designing and optimizing nanometre scale refractive index sensors, which can be applied for performance testing before circuit construction. |
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