Silver, Bi2Te3 and Antimonene Based Surface Plasmon Resonance Sensor for Enhancement of Sensitivity
Keywords:SPR, sensitivity, Kretschmann, SNR, figure of merit, BK7
A biosensor based on the surface plasmon resonance has been theoretically analyzed. The proposed surface plasmon resonance (SPR) sensor consists of a hybrid structure with Ag/Bismuth telluride (Bi2Te3)/Antimonene (An)/Sensing medium layers. BK7 is used as the main coupling prism. The sensor’s sensitivity performance gets enhanced by depositing Bi2Te3 and antimonene layers over the conventional sensor’s configuration. The Ag, Bi2Te3, and antimonene layer optimized thickness were taken as 45 nm, 0.5 nm, and 0.5 nm, respectively. The proposed sensor has been working on attenuated total reflection. The proposed sensor shows the highest sensitivity of 154 degree/RIU, a signal-to-noise ratio of 0.19 degrees-1 with a figure of merit of 29.26 RIU-1. The proposed SPR sensor can be used for bio analyte and biochemical detection.
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