Journal
SENSORS
Volume 21, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/s21041164
Keywords
Fano resonance; metal-dielectric-metal; finite element method; plasmonic nanosensor
Funding
- National Natural Science Foundation of China [61765004, 61465004, 61874036]
- Guangxi Natural Science Foundation [2017GXNSFAA198164, 2016GXNSFAA380006]
- Guangxi Key Laboratory of Precision Navigation Technology and Application [DH202006, DH202004]
- Guangxi Key Laboratory of Automatic Detecting Technology and Instruments [YQ20115]
- Open Fund of Foshan University
- Research Fund of Guangdong Provincial Key Laboratory of Semiconductor Micro Display [2020B121202003]
- Research Fund of Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology [2020B1212030010]
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This study introduces a tunable plasmonic sensor with Fano resonators, achieving a high sensitivity refractive index sensor through optimized structural parameters.
Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 x 10(5). The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.
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