4.4 Article

Analysis of a Surface Plasmon Resonance Probe Based on Photonic Crystal Fibers for Low Refractive Index Detection

Journal

PLASMONICS
Volume 13, Issue 3, Pages 779-784

Publisher

SPRINGER
DOI: 10.1007/s11468-017-0572-7

Keywords

Photonic crystal fiber; Surface plasmon resonance; Probe; Finite element method

Funding

  1. National Natural Science Foundation of China [51474069]
  2. China Postdoctoral Science Foundation [2016 M59150]
  3. Natural Science Foundation of Heilongjiang Province [E2016007]
  4. City University of Hong Kong [9667122, 7004644]

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A photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) probe with gold nanowires as the plasmonic material is proposed in this work. The coupling characteristics and sensing properties of the probe are numerically investigated by the finite element method. The probe is designed to detect low refractive indices between 1.27 and 1.36. The maximum spectral sensitivity and amplitude sensitivity are 6 x 10(3) nm/RIU and 600 RIU-1 respectively, corresponding to a resolution of 2.8 x 10(-5) RIU for the overall refractive index range. Our analysis shows that the PCF-SPR probe can be used for lower refractive index detection.

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