Effect of Metallic Adhesion Layer Thickness on Surface Roughness for Sensing Application

This letter is done to find the effect of adhesion layer on the surface plasmon resonance sensor surface. Herein, titanium is used as adhesion layer between substrate, i.e., indium tin oxide coated glass, and top layer, i.e., silver. For observing the mentioned effect, simulation, as well as experimental studies, is carried out. Characterization of the fabricated chip is performed in order to observe the surface characteristics. Roughness and its effect on sensitivity are observed at different thicknesses of the adhesion layer. Moreover, the transverse magnetic field is plotted to calculate the penetration depth in sensing medium.