Comparative assessment of fiber SPR sensor for sensitivity enhancement using BaTiO3 layer

In this work, we have numerically simulated a fiber surface plasmon resonance sensor. This work explored a comparative assessment of three different metal layers (silver (Ag)/gold (Au)/copper (Cu)) over the unclad optical fiber. These layers are further protected with the barium titanate (BaTiO3) layer. The results of the proposed structure are shown with the transmission spectra for the various refractive indexes and the performance of this structure with three different configurations (Ag+BaTiO3, Au+BaTiO3, and Cu+BaTiO3) is investigated. After a comparative analysis, we found the highest sensitivity with the Au+BaTiO3 configuration. Hence, the proposed structure can be suitable for biosensing applications.

Automated summary

In this study, a numerical simulation of a fiber surface plasmon resonance sensor was conducted, investigating the effects of different metal layers and configurations on its performance. The results showed that the Au+BaTiO3 configuration exhibited the highest sensitivity, making it suitable for biosensing applications.