Design and investigation of a multi-layer hybrid plasmonic sensor using franckeite material

This paper proposes a high-performance plasmonic surface plasmon resonance (SPR) sensor with a tunable detection range. It ensures improved sensing performance by using yttrium lithium fluoride (YLiF₄), silver (Ag), and franckeite layers. Using simulation, we looked at how attachment-enhancing materials affected the sensor's functionality. According to the results, the best outcomes are achieved by optimizing the YLiF₄ thickness to 250 nm, the Ag layer thickness to 40 nm, and the pitch value difference to 0.45 µm. By detecting shifts in their individual resonance wavelengths, which are characteristic of the sensing medium's RI, the YLiF₄-Ag-franckiete layer combination has a maximum wavelength sensitivity (WS) of 22,500 nm/RIU within the analyte refractive index (RI) range of 1.36-1.38 (basal cancer), according to the results. Full-width at half-maximum (FWHM), resolution, detection accuracy (DA), and figure of merit (FoM) are among the other important performance indicators that are evaluated. The sensor is ideal for precise biomolecule sensing applications because of its high sensitivity to basal cancer, which shows that it can detect even the smallest changes in the sensing environment.