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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.
Barium titanate, Sensitivity, Surface plasmon resonance, Fiber.
N. MUDGAL, K. K. CHOURE, A. SAHARIA, A. AGARWAL, M. K. FALASWAL, S. SAHU, S. V. SINGH, G. SINGH, Comparative assessment of fiber SPR sensor for sensitivity enhancement using BaTiO3 layer, Optoelectronics and Advanced Materials - Rapid Communications, 16, 3-4, March-April 2022, pp.114-120 (2022).
Submitted at: Oct. 22, 2021
Accepted at: April 7, 2022