Comprehensive study of generating sharp dip using numerical analysis in prism based surface plasmon resonance
Ali Abdulkhaleq Alwahib, Sura Hmoud Al-Rekabi, Wijdan H. Muttlak
Abstract
Surface plasmon resonance is a valuable tool and widely applied in many fields recently. This approach will focus on enhancing a sharp dip of the reflectance curve by using surface plasmon resonance. The reflection light from prism-based was simulated depending on the thickness and number of plasmonic layers. The addition of the air gap between the two layers of the same and different plasmonic materials optimizes the sharpness of the reflection curve. The sharpness of the reflection curve was examined for accuracy and sensitivity at 632 nm and 1550 nm in triple layers design and compared to the single-layer design. The result shows that the triple layers have higher accuracy than a single layer and also higher at 1550 nm compared with 632 nm. The result also compared with sensitivity at both wavelengths. The sharpness of the resonance curve will help to specify the resonance dip of the reflection SPR curve. The new design investigation was based on the air gap, variation of the thickness, and the type of plasmonic material.