Design of highly sensitive multichannel bimetallic photonic crystal fiber biosensor

Mohamed Farhat O. Hameed; Yassmin K.  A. Alrayk; AbdelHamid A. Shaalan; Walid S. El Deeb; Salah S.  A Obayya

doi:10.1117/1.JNP.10.046016

7 December 2016 Design of highly sensitive multichannel bimetallic photonic crystal fiber biosensor

Mohamed Farhat O. Hameed, Yassmin K. A. Alrayk, AbdelHamid A. Shaalan, Walid S. El Deeb, Salah S. A Obayya

Author Affiliations +

Journal of Nanophotonics, Vol. 10, Issue 4, 046016 (December 2016). https://doi.org/10.1117/1.JNP.10.046016

Abstract

A design of a highly sensitive multichannel biosensor based on photonic crystal fiber is proposed and analyzed. The suggested design has a silver layer as a plasmonic material coated by a gold layer to protect silver oxidation. The reported sensor is based on detection using the quasi transverse electric (TE) and quasi transverse magnetic (TM) modes, which offers the possibility of multichannel/multianalyte sensing. The numerical results are obtained using a finite element method with perfect matched layer boundary conditions. The sensor geometrical parameters are optimized to achieve high sensitivity for the two polarized modes. High-refractive index sensitivity of about 4750 nm/RIU (refractive index unit) and 4300 nm/RIU with corresponding resolutions of 2.1×10⁻⁵ RIU, and 2.33×10⁻⁵ RIU can be obtained according to the quasi TM and quasi TE modes of the proposed sensor, respectively. Further, the reported design can be used as a self-calibration biosensor within an unknown analyte refractive index ranging from 1.33 to 1.35 with high linearity and high accuracy. Moreover, the suggested biosensor has advantages in terms of compactness and better integration of microfluidics setup, waveguide, and metallic layers into a single structure.

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Mohamed Farhat O. Hameed, Yassmin K. A. Alrayk, AbdelHamid A. Shaalan, Walid S. El Deeb, and Salah S. A Obayya "Design of highly sensitive multichannel bimetallic photonic crystal fiber biosensor," Journal of Nanophotonics 10(4), 046016 (7 December 2016). https://doi.org/10.1117/1.JNP.10.046016

Published: 7 December 2016

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