Black Phosphorus: A New Platform for Gaseous Sensing Based on Surface Plasmon Resonance

We numerically demonstrate and propose sensitivity enhancement of surface plasmon resonance (SPR)-based conventional gaseous sensor using few layers of black phosphorous (BP), as compared with other 2D material such as graphene and molybdenum disulphide (MoS₂). Results of our optimized numerical study show that with implementation of bilayer BP over a conventional gaseous sensor, sensitivity enhances by _~35%, which is further increased up to _~73% by addition of a monolayer MoS₂ at an operating wavelength λ =633 nm. Therefore, the proposed SPR gaseous sensor could potentially open a new platform for high-performance gaseous sensing in the visible region.