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Article Abstract
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 × 10. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7914613 | PMC |
| http://dx.doi.org/10.3390/s21041164 | DOI Listing |
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