Journal
PLASMONICS
Volume 17, Issue 1, Pages 295-304Publisher
SPRINGER
DOI: 10.1007/s11468-021-01518-2
Keywords
Photonic crystal fiber; Surface plasmon resonance; Finite element method; Refractive index
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A dual-core photonic crystal fiber with dual-channel-based surface plasmon resonance sensor is developed for highly sensitive detection of two analytes simultaneously, achieving average spectral sensitivities of 4280 and 3940 nm/RIU and RI resolutions of 2.34 x 10(-5) and 2.54 x 10(-5) RIU for left and right channels, respectively. The designed sensor shows potential for wide application in biomedical analysis and environmental monitoring.
A dual-core photonic crystal fiber (PCF) with dual-channel-based surface plasmon resonance (SPR) sensor is designed. The silver and gold films are severally coated in the inner walls of two large ring detection channels to excite the plasmon modes, which can make the designed sensor achieve the dual-channel sensing. The effect of structure parameters on the sensing properties and loss spectrum is numerically analyzed by finite element method (FEM). When the analyte refractive index (RI) changes from 1.340 to 1.360, the average spectral sensitivities of 4280 and 3940 nm/RIU are obtained for the left and right channels, corresponding to the RI resolutions of 2.34 x 10(-5) and 2.54 x 10(-5) RIU, respectively. The simulation results suggest that the designed dual-channel sensor can realize highly sensitive detection of two analytes simultaneously, which has a wide application in the fields of biomedical analysis and environmental monitoring.
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