Laser & Optoelectronics Progress, Volume. 57, Issue 5, 052401(2020)
Plasma Refractive Index Nanosensor Based on Fano Resonance
A plasma refractive index nanosensor based on Fano resonance is designed, which is composed of the metal-insulator-metal waveguide with a stub coupled with a split-square resonator. Analysis of transmission characteristics of the sensor's structure is performed using the finite element method, and the influences of the structural parameters on the sensing characteristics of the sensor are studied. The calculated results show that the structure can excite the Fano resonance, and the resonance peak wavelength and line type can be adjusted by changing the key parameters. By adjusting the structural parameters, the sensitivity of the structure is up to 1125.7 nm/RIU and the figure of merit is 30.01. The results indicate that the proposed structure can be applied to optical integrated circuits, especially in nanometer biosensors.
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Mengmeng Wang, Liyu Yun, Yifei Wang, Xiaoyu Yang, Feng Wen, Shubin Yan. Plasma Refractive Index Nanosensor Based on Fano Resonance[J]. Laser & Optoelectronics Progress, 2020, 57(5): 052401
Category: Optics at Surfaces
Received: May. 5, 2019
Accepted: Aug. 28, 2019
Published Online: Mar. 5, 2020
The Author Email: Yan Shubin (yanshb@zjweu.edu.cn)