Journal of Applied Research in Electrical Engineering

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Document Type : Research article

Authors

Faculty of Electrical and Computer Engineering, Hakim Sabzevari University, Sabzevar, 9617976487, Iran

https://doi.org/10.22055/jaree.2022.39570.1044

Abstract

Surface plasmon resonance (SPR) sensors have been widely considered for their sensitivity, accuracy, and appropriate response speed. This article simulates and analyzes the effects of phosphorene nanotubes (PNTs) layer with various diameters and rolling directions on the structure of SPR biosensor in the Lumerical software environment. The main structure is based on the structure of Kretschmann and the use of the BK₇ prism, a gold (Au) layer, and the end layer of phosphorene nanotubes. The proposed SPR biosensor reflectance curves are obtained, analyzed, and compared for various modes of refractive index n = 1.33 and 1.339, resembling a neutral watery medium and a bacterial medium, respectively. The results show that the minimum reflection is achieved for 30 nm Au at an SPR resonance angle of θ = 71.59° while by adding phosphorene nanotubes, it is observed that at a diameter of 10.08 A and an armchair rolling direction, the configuration on the Au layer becomes favorable. The minimum reflectance of 0.199 is observed for the armchair phosphorene nanotubes (10.08A) layer over 30 nm Au. The combination also provides a sensitivity of 152°/RIU for Δn = 0.009 with a high detection accuracy of 0.079. The results demonstrate that the layer of phosphorene nanotubes has a positive effect on SPR biosensors, and it can be used as a controlling factor in SPR biosensors.

Highlights

The main structure of the proposed SPR-Biosensor is based on the structure of Kretschmann and the use of the BK7 prism, the gold (Au) layer, and the end layer of phosphorene nanotubes (PNTs).
The simulation is performed in the FDTD (Finite Difference Time Domain) module of Lumerical software.
The effect of various PNTs/Au combinations and the diameter of their flakes on the spectral response of an SPR biosensor was studied and introduced.
The results also show that increasing the diameter of the layers in the outlet has a direct effect on the sensor's efficiency and enhances the sensor's performance.
The results show that the PNTs (10.08A) over 30nm Au have the highest sensitivity of 152°/RIU.

Keywords

Main Subjects

References

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Journal of Applied Research in Electrical Engineering

Volume 1, Issue 2
Summer and Autumn 2022
July 2022
Pages 169-174

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History

Receive Date: 25 December 2021
Revise Date: 01 February 2022
Accept Date: 04 February 2022

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