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Sensors 2015, 15(5), 11499-11510; doi:10.3390/s150511499

Photonic Crystal Fiber-Based Surface Plasmon Resonance Sensor with Selective Analyte Channels and Graphene-Silver Deposited Core

1
Integrated Lightwave Research Group, Dept. of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur-50603, Malaysia
2
Institut für Hochfrequenztechnik, Technische Universität Berlin, Einsteinufer 25, 10587 Berlin, Germany
*
Authors to whom correspondence should be addressed.
Academic Editors: Gary R. Pickrell and Daniel Homa
Received: 13 February 2015 / Revised: 26 March 2015 / Accepted: 22 April 2015 / Published: 19 May 2015
(This article belongs to the Special Issue Optical Sensors for Chemical, Biological and Industrial Applications)
View Full-Text   |   Download PDF [1186 KB, uploaded 19 May 2015]   |  

Abstract

We propose a surface plasmon resonance (SPR) sensor based on photonic crystal fiber (PCF) with selectively filled analyte channels. Silver is used as the plasmonic material to accurately detect the analytes and is coated with a thin graphene layer to prevent oxidation. The liquid-filled cores are placed near to the metallic channel for easy excitation of free electrons to produce surface plasmon waves (SPWs). Surface plasmons along the metal surface are excited with a leaky Gaussian-like core guided mode. Numerical investigations of the fiber’s properties and sensing performance are performed using the finite element method (FEM). The proposed sensor shows maximum amplitude sensitivity of 418 Refractive Index Units (RIU−1) with resolution as high as 2.4 × 10−5 RIU. Using the wavelength interrogation method, a maximum refractive index (RI) sensitivity of 3000 nm/RIU in the sensing range of 1.46–1.49 is achieved. The proposed sensor is suitable for detecting various high RI chemicals, biochemical and organic chemical analytes. Additionally, the effects of fiber structural parameters on the properties of plasmonic excitation are investigated and optimized for sensing performance as well as reducing the sensor’s footprint. View Full-Text
Keywords: photonic crystal fiber; surface plasmon resonance; optical fiber sensors; optical sensing and sensors photonic crystal fiber; surface plasmon resonance; optical fiber sensors; optical sensing and sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Rifat, A.A.; Mahdiraji, G.A.; Chow, D.M.; Shee, Y.G.; Ahmed, R.; Adikan, F.R.M. Photonic Crystal Fiber-Based Surface Plasmon Resonance Sensor with Selective Analyte Channels and Graphene-Silver Deposited Core. Sensors 2015, 15, 11499-11510.

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