Sensitivity Improvement of Surface Plasmon Resonance Sensor on Using BlueP/MoS<sub>2</sub> Heterostructure and Antimonene
Maneesh Kumar Singh, Sarika Pal, Yogendra Kumar Prajapati, J. P. Saini
Abstract
Here, an ultrasensitive surface plasmon resonance (SPR) sensor based on angular interrogation using antimonene and BlueP/MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> heterostructure is proposed. Antimonene is used as an interacting layer for analytes due to its higher binding energy for analyte adsorption. BlueP/MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> enhances the sensitivity by manipulating charge transfer to metal/dielectric interface. Sensitivity for the proposed SPR is analyzed by tuning the number of heterostructure, as well as antimonene layers for wide range of refractive index. Highest sensitivity of 198.4°/RIU is achieved for three layers of BlueP/MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> . Results show significant sensitivity for proposed design in comparison to conventional and graphene based SPR sensor. Proposed SPR sensor can be successfully developed as SPR chip for biomolecule/analyte detection in visible range.