Numerical Study to Enhance the Sensitivity of a Surface Plasmon Resonance Sensor with BlueP/WS2-Covered Al2O3-Nickel Nanofilms

Abstract

In the traditional surface plasmon resonance sensor, the sensitivity is calculated by the usage of angular interrogation. The proposed surface plasmon resonance (SPR) sensor uses a diamagnetic material (Al2O3), nickel (Ni), and two-dimensional (2D) BlueP/WS2 (blue phosphorous-tungsten di-sulfide). The Al2O3 sheet is sandwiched between silver (Ag) and nickel (Ni) films in the Kretschmann configuration. A mathematical simulation is performed to improve the sensitivity of an SPR sensor in the visible region at a frequency of 633 nm. The simulation results show that an upgraded sensitivity of 332°/RIU is achieved for the metallic arrangement consisting of 17 nm of Al2O3 and 4 nm of Ni in thickness for analyte refractive indices ranging from 1.330 to 1.335. The thickness variation of the layers plays a curial role in enhancing the performance of the SPR sensor. The thickness variation of the proposed configuration containing 20 nm of Al2O3 and 1 nm of Ni with a monolayer of 2D material BlueP/WS2 enhances the sensitivity to as high as 374°/RIU. Furthermore, it is found that the sensitivity can be altered and managed by means of altering the film portions of Ni and Al2O3

A theoretical approach for a new design of an ultrasensitive angular plasmonic chemical sensor using black phosphorus and aluminum oxide architecture

“…7 can be used to find the detection limit and limit of qualification of the optimized hybrid biosensing design, in addition to Table 7. The parameters detection limit (DL) and limit of qualification (LoQ) of any SPR-based biosensors are defined as: 14,24 Here, the slope of the line, as plotted in Fig. 6, is 462.14 and the standard deviation (SD) of the refractive indices of the samples under consideration (see Table 7) is 0.023886654.…”

“…7 can be used to nd the detection limit and limit of qualication of the optimized hybrid biosensing design, in addition to Table 7. The parameters detection limit (DL) and limit of qualication (LoQ) of any SPR-based biosensors are dened as: 14,24 DL ¼ 3 Â SD slope (8)…”

Design and Simulation of Au/SiO2 Nanospheres Based on SPR Refractive Index Sensor

“…The wave vector of surface plasmon ( ) and the wave vector of polarized incident light ( ) can be expressed as follows [ 36 , 37 ]: where represents the RI of the metal film, represents the RI of the sensing medium, is the RI of the prism, λ is the incident wavelength and is the incident angle.…”

Sensitivity Enhancement of 2D Material-Based Surface Plasmon Resonance Sensor with an Al–Ni Bimetallic Structure

“…In addition, the novel 2D material of blue phosphorus (BlueP)/TMDC with similar hexagonal crystal-like structure has attracted attention [ 30 ]. Shivangani et al theoretically presented a SPR sensor by using BlueP/WS 2 on Ag–Al 2 O 3 –Ni and exhibited the sensitivity of 374 °/RIU at 633 nm [ 31 ].…”