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 similar to 35%, which is further increased up to similar to 73% by addition of a monolayer MoS2 at an operating wavelength lambda = 633 nm. Therefore, the proposed SPR gaseous sensor could potentially open a new platform for high-performance gaseous sensing in the visible region.