Photonic crystal fiber-based plasmonic biosensor with external sensing approach

Ahmmed A. Rifat, Md Rabiul Hasan, Rajib Ahmed, Haider Butt

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


We propose a simple photonic crystal fiber (PCF) biosensor based on the surface plasmon resonance effect. The sensing properties are characterized using the finite element method. Chemically stable gold material is deposited on the outer surface of the PCF to realize the practical sensing approach. The performance of the modeled biosensor is investigated in terms of wavelength sensitivity, amplitude sensitivity, sensor resolution, and linearity of the resonant wavelength with the variation of structural parameters. In the sensing range of 1.33 to 1.37, maximum sensitivities of 4000 nm/RIU and 478 RIU-1 are achieved with the high sensor resolutions of 2.5 × 10-5 and 2.1 × 10-5 RIU using wavelength and amplitude interrogation methods, respectively. The designed biosensor will reduce fabrication complexity due to its simple and realistic hexagonal lattice structure. It is anticipated that the proposed biosensor may find possible applications for unknown biological and biochemical analyte detections with a high degree of accuracy.

Original languageBritish English
Article number012503
JournalJournal of Nanophotonics
Issue number1
StatePublished - 1 Jan 2018


  • biosensor
  • fiber optic sensor
  • photonic crystal fiber
  • resolution
  • sensitivity
  • surface plasmon resonance


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