Improving the Angular Sensitivity of a Surface Plasmon Resonance Biosensor Based on bilayer of Ag and MXene: a Simulation-Based Approach

Here, we proposed an SPR biosensor based on the Kretschmann configuration which consists of several materials including the bilayer of silver (Ag), molybdenum disulfide (MoS۲), molybdenum trioxide (MoO۳), titanium carbide MXene (Ti۳C۲Tx), and the BK۷ coupling prism. The finite-difference time-domain (FDTD) technique was employed to evaluate the effects of various structural parameters on the reflectance curve and sensing performance. The proposed SPR sensor shows a high sensitivity of ۲۱۸ deg/RIU and a high relatively FOM of ۴۰.۶۳ RIU-۱. The simulation results show the proposed sensor effectively increases the strength of the interaction between the incident light and the analyte as a result the propagation loss is relatively reduced.

کلیدواژه ها:

Surface plasmon resonance ، refractive index ، MXene ، sensitivity ، finite-difference time-domain.