Plasmonic Sensor Based on Graphene, Black and Blue Phosphorous in the Visible Spectrum

Abstract

Numerical and theoretical analysis of plasmonic sensors based on Graphene, Black Phosphorous, and Blue Phosphorous are accomplished in visible spectrum from 480 to 650 nm. Attenuated total reflection intensity is obtained using a transfer matrix method. Angular interrogation is used for the surface plasmon resonance curve. Performance defining parameters viz shift in resonace angle, minimum reflection intensity, and beam width are obtained in visible spectrum for sensors having monolayer Graphene, five layers Black Phosphorous, and five layers Blue Phosphorous. It is found that the sensor is best suited in a far visible region. Further, addition of nanolayers increases minimum reflection intensity and beamwidth. Black Phosphorous has the highest shift in resonance angle followed by Blue Phosphorous and Graphene but at the penalty of higher minimum reflection intensity and beamwidth.