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Volume 9
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10.3390/photonics9120982
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Article

Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena

by
Yifeng Ren
1,
Qiang Wang
1,2,3,
Lifang Shen
2,
Feng Liu
1,2,3,
Yang Cui
2,
Chuanhui Zhu
2,
Zhanbo Chen
2,
Biyi Huang
2 and
Shubin Yan
2,*
1
School of Electrical and Control Engineering, North University of China, Taiyuan 030051, China
2
School of Electrical Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
3
Joint Laboratory of Intelligent Equipment and System for Water Conservancy and Hydropower Safety Monitoring of Zhejiang Province and Belarus, Hangzhou 310018, China
*
Author to whom correspondence should be addressed.
Photonics 2022, 9(12), 982; https://doi.org/10.3390/photonics9120982
Submission received: 2 November 2022 / Revised: 6 December 2022 / Accepted: 12 December 2022 / Published: 14 December 2022
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Abstract

In this paper, a new refractive index sensor based on Fano resonance is introduced. It is mainly composed of two parts: a metal–insulator–metal as a base waveguide and an annular resonant cavity with a double notch and a double convex circle as a coupling structure. The sensing characteristics of the design are investigated via finite element calculations. The influence of the remaining structure parameters on the system’s sensing performance and the relationship between the wavelength corresponding to the Fano trough and the refractive index are also investigated. Furthermore, the structure is applied to refractive index sensors, resulting in a type with a sensitivity of 2740 nm/RIU and a figure of merit of 52.69.
Keywords: Fano resonance; coupling; refractive index sensing; finite element method Fano resonance; coupling; refractive index sensing; finite element method

Share and Cite

MDPI and ACS Style

Ren, Y.; Wang, Q.; Shen, L.; Liu, F.; Cui, Y.; Zhu, C.; Chen, Z.; Huang, B.; Yan, S. Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena. Photonics 2022, 9, 982. https://doi.org/10.3390/photonics9120982

AMA Style

Ren Y, Wang Q, Shen L, Liu F, Cui Y, Zhu C, Chen Z, Huang B, Yan S. Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena. Photonics. 2022; 9(12):982. https://doi.org/10.3390/photonics9120982

Chicago/Turabian Style

Ren, Yifeng, Qiang Wang, Lifang Shen, Feng Liu, Yang Cui, Chuanhui Zhu, Zhanbo Chen, Biyi Huang, and Shubin Yan. 2022. "Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena" Photonics 9, no. 12: 982. https://doi.org/10.3390/photonics9120982

APA Style

Ren, Y., Wang, Q., Shen, L., Liu, F., Cui, Y., Zhu, C., Chen, Z., Huang, B., & Yan, S. (2022). Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena. Photonics, 9(12), 982. https://doi.org/10.3390/photonics9120982

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