Sensitivity enhancement by using few-layer black phosphorus-graphene/TMDCs heterostructure in surface plasmon resonance biochemical sensor

Sensitivity Enhancement of a Surface Plasmon Resonance Sensor with Platinum Diselenide

“…As a result of certain restrictions on the angle range, there was a direct relation of the variation of the resonance angle with the sensitivity (i.e., as the variation of the resonance angle lowered, the sensitivity decreased after exceeding the optimized PtSe 2 layers). In the end, we are also aware that most high-sensitivity sensors are accompanied by an increase in SPR linewidth and a reduction in figure of merit (FOM), and a higher FOM usually means a lower sensitivity [48]. Table 1 also lists the FWHM, DA, and FOM data for these PtSe 2 biosensors.…”

Graphene-Coated Optical Fiber SPR Biosensor for BRCA1 and BRCA2 Breast Cancer Biomarker Detection: a Numerical Design-Based Analysis

“…4(a) and 4(b). The SPR angle (δθ SPR = 0.35 °) and SRF (δSRF = 0.36 THz) have been increased due to adding the graphene film which is caused for enhancing the sensitivity of this sensor [11][12][13][14]. The detecting attributor's δθ SPR and δSRF are shifting rightwards because of adding the graphene layer, as given in Table 3, as well as table data depicted in Figs.…”

“…In Fig. 6, it is observed that the normalized electric field can obtain greater absorption of light to have large SPW excitation, Md The addition of 2D material (graphene) over the gold layer can affect the field intensity which causes the sensitivity enhancement by increasing the mobility of electrons [11][12][13][14]. The electric field intensity approaches to its maximum value when the reflectance curve shows the minimum value of reflectivity.…”

“…In (5) to (9), n p is the RI of the prism, θ in is the initial incident angle indicated in (13), ϵ k is the permittivity of the kth layer dielectric, and d k is the thickness of the kth layer (thickness of mono layer graphene d g = 0.34 nm, thickness of gold d Au = 50 nm), respectively. For TM polarization, the electric field generated owing to the SPW along the x direction is specified in [30] as…”

“…Graphene is a 2D material of graphite of one atom in thickness arranged in a honeycomb lattice. It shows many properties, such as high optical transparency, low reluctance, high carrier mobility, and tunability [12,13]. In literature [14], graphene was used to improve sensor performance (sensitivity) as biomolecular recognition elements (BRE).…”