A Highly Sensitive SPR Sensors Based on Two Parallel PCFs for Low Refractive Index Detection

Based on two parallel photonic crystal fibers (PCFs) with D-shape structure, a novel surface plasmon resonance (SPR) sensor with low refractive index (RI) detection at near-infrared wavelengths is described. According to the coupled-mode theory, directional power transfer between the two fiber cores...

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Bibliographic Details
Published in:IEEE photonics journal 2018-08, Vol.10 (4), p.1-10
Main Authors: Wang, Famei, Liu, Chao, Sun, Zhijie, Sun, Tao, Liu, Banghua, Chu, Paul K.
Format: Article
Language:English
Subjects:
Coupled modes
Crystal fibers
Crystal structure
Gold
Inspection
lower RI detection
near-infrared
Optical fiber sensors
Optical fibers
parallel fiber
PCF-SPR
Pharmaceuticals
Photonic crystals
Plasmons
Power transfer
Refractivity
Sensitivity
Spectral sensitivity
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Summary:Based on two parallel photonic crystal fibers (PCFs) with D-shape structure, a novel surface plasmon resonance (SPR) sensor with low refractive index (RI) detection at near-infrared wavelengths is described. According to the coupled-mode theory, directional power transfer between the two fiber cores is enhanced by resonant coupling between the surface plasmon modes and fiber core-guided modes. In comparison with corresponding single D-shape PCF, a maximum spectral sensitivity up to 13 500 nm/RIU and resolution of 7.41 × 10 -6 RIU for RI detection range between 1.27 and 1.32 are achieved. The proposed two parallel D-shape PCFs-SPR sensor with lower RI detection range offer large potential in the fields of pharmaceutical inspection and pharmaceutical leakage monitoring.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2018.2856273