Numerical study among Au, Al, and Ag metal-based surface plasmon resonance sensor

In this simulation work, comparative study of surface plasmon resonance (SPR)-based sensor designed with gold (Au), aluminium (Al), and silver (Ag) is numerically investigated to improve the performance parameter of device using Ni-antimonene layer in the visible range of light at wavelength of 633 nm. In this device configuration, different metals (Ag/Au/Al), a diamagnetic material ferric oxide (Fe 2 O 3 ), nickel (Ni) and 2D material antimonene (Sb) are used with CaF 2 glass prism using Kretschmann configuration with angle interrogation method. The angle interrogation method is used to examine the performance of the device. The performance parameters of SPR sensor such as sensitivity, detection accuracy (DA), and quality factor (QF) have been calculated. The present study provides a comparative study of plasmonic metal Ag, Au and Al. The multilayer configuration of SPR sensor consists Ag, Fe 2 O 3 , Ni, and antimonene which provides maximum sensitivity 310 0 /RIU. The sensitivities of Au and Al metals are 66 0 RIU −1 and 204 0 RIU −1 , respectively, which is less in comparison with Ag metal. The different performance parameters of SPR sensor have been calculated for comparative study of Ag, Au and Al metals. The penetration depth (PD) 110.5 nm and 3D plot of transverse electric (TM) field intensity have also been plotted. The proposed SPR sensor using Ag metal with highest sensitivity value has capability to detect the different liquid analytes in the field of biosensing application with large uses in biomedical field in visible range.