2-D blue Phosphorene/Molybdenum Disulfide (BlueP/MoS2) Hybrid Structure with Enhanced Sensitivity based on SPR for Chemical Sensing

Abstract

SPR (surface Plasmon resonance) based sensors have a significant role in sensing applications in real-time monitoring. Label-free detection and repeatable measurements. Chemical produced in fruits during food adulteration is detrimental to the health; hence, SPR sensors play a vital role in detecting these chemicals. In the present study, two-dimensional (2D) materials-based, such as black phosphorus (B.P.), the optimized structure of the SPR-based chemical sensor with the increased sensitivity and better figure of merit (FOM), have been proposed. The Heterostructure of the Blue P and 2D materials has enhanced the sensitivity. The excellent performances can be achieved by accurate the silver film thickness and the number of interlayers. In this configuration, the Blue Phosphorene/MoS2 Heterostructure with a silver metal layer and the B.P. layer. Simulation of the adapted structure's sensitivity properties using angular interrogation reveals that the sensitivity can be improved highly with the new design. Moreover, the number of Blue Phosphorene/MoS2 layers for best simulation results is also clarified. The maximum sensitivity of the proposed optimized structure has been found at 458 Degree/RIU for the $5 \times 10^{-3}$ index variation at the wavelength of $662nm$. The results from the proposed structure show that the Sensor can enhance the sensitivity of the aqueous solution of the chemicals having the refractive index from $1.33\ RIU$ to $1.36\ RIU$.