Analytical study of planar waveguide sensor with a metamaterial guiding layer

Abstract

Sensitivities of three-layer and four-layer planar waveguide sensors having metamaterial as guiding layer are analyzed for p-polarization of incident light and compared with existing results. Proposed sensors show improved cover layer sensitivity for each case of the cover layer refractive index. Also, proposed sensors demonstrate improved adlayer sensitivity for different values of adlayer thickness and adlayer refractive indices. It is observed that metamaterial has increased the evanescent field due to the unconventional nature of it, by which values of cover layer sensitivity as well as adlayer sensitivity are enhanced.

Detection of Leptospirosis Bacteria in Rodent Urine by Surface Plasmon Resonance Sensor Using Graphene

“…Graphene is chemical inert in nature [12] and can easily be attached on the plasmonic metal, and it can also bind the carbon ring of biomolecule through pi-stacking property [13]. Also, graphene on plasmonic metal has higher sensitivity than bare plasmonic metals [14,15]. In addition, graphene improves the confinement, propagation distance, and electrostatic tunability by enhancing the light-matter interaction [16,17].…”