19 June 2017 Photonic crystal fiber-based plasmonic biosensor with external sensing approach
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Ahmmed A. Rifat, Ahmmed A. Rifat, Md. Rabiul Hasan, Md. Rabiul Hasan, Rajib Ahmed, Rajib Ahmed, Haider Butt, Haider Butt, } "Photonic crystal fiber-based plasmonic biosensor with external sensing approach," Journal of Nanophotonics 12(1), 012503 (19 June 2017). https://doi.org/10.1117/1.JNP.12.012503 . Submission: Received: 24 March 2017; Accepted: 5 June 2017
Received: 24 March 2017; Accepted: 5 June 2017; Published: 19 June 2017

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