Highly efficient SPR sensor based on Al metal and 2D materials

Document Type : Original Article

Authors

1 Department of Electrical Engineering, Sahand University of Technology, Tabriz, 51335-1996 Iran

2 Nano-Optics and Photonics Research Lab (NOPRL), Sahand University of Technology, Tabriz, Iran

Abstract

In this article, the characteristics of the proposed surface plasmon resonance sensor with Kretschmann configuration is investigated. The proposed sensor consists of aluminum metal and two-dimensional materials for which the the number of layers and their thickness have been optimized to achieve the highest sensitivity. In the proposed sensor, the aluminum metal has been used due to its low cost and the two-dimensional materials and transition metal dichalcogenides are used due to their high surface to volume ratio which assist to obtain high sensitivity. The structure comprised of CaF2/Al/Al2O3/2L Graphene/10L Black Phosphorous is the optimal structure. The presented sensor based on surface plasmon resonance, provides sensitivity of S=304 deg/RIU, figure of merit of FOM=194.871 RIU-1, minimum reflectance of Rmin=0.14, and the full width at half maximum of FWHM=1.56 deg and it is usable as a biosensor. The optimization and the study of the proposed structure which is based on angular interogation, has been carried out using the transfer matrix method and implementing Lumerical software.

Keywords

Main Subjects

References

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Tabriz Journal of Electrical Engineering
Volume 55, Issue 2 - Serial Number 112
October 2025
Pages 391-398

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