Metal

Zinc sulfide

Engineering

Nanoparticle

Full width at half maximum

Metallurgy

Materials science

Chromatography

Graphene

Surface plasmon

Zinc

Surface plasmon resonance

Biosensor

Physical chemistry

Physics

Nanotechnology

Optics

Analyte

Electronic engineering

Sensitivity (control systems)

Analytical Chemistry (journal)

Plasmon

Chemistry

Optoelectronics

Prism

Journal of Computational Electronics

A biosensor based on the modified Kretschmann configuration is proposed here. The sensitivity of the conventional prism-based sensor using angular interrogation is low. To enhance the sensor's performance, layers of zinc sulfide (ZnS) and graphene have been deposited over the metal layer. The angular interrogation technique is used to analyze the performance of the sensor. The thickness of the Ag metal has been optimized. The thickness of the Ag metal is taken as 50 nm because minimum reflectance has been achieved. With the combinations of the four layers of ZnS and one graphene layer, the maximum sensitivity attained is $$292.8^\circ /RIU$$ . Performance parameters such as detection accuracy, FWHM, and quality factor of the sensor have been evaluated as obtained as 0.16 $${\text{ deg}}^{ - 1}$$ , 6.37 $${\text{ deg}}$$ , 46 $$RIU^{ - 1}$$ , respectively. The proposed sensor has potential application in the field of biochemical and biological analyte detection.

Sensitivity enhancement of a graphene, zinc sulfide-based surface plasmon resonance biosensor with an Ag metal configuration in the visible region