Tunable dual-plasmon induced transparency based on monolayer black phosphorus metamaterial and its sensing performance

Abstract

Abstract In this study, we propose a monolayer periodic structure of black phosphorus (BP) metamaterials in the mid-infrared region to achieve tunable dual-plasmon-induced transparency (PIT). The dual PIT effect was regulated by changing the carrier concentration of BP. The results obtained using the finite-difference time-domain method are very similar to those obtained using coupled modal theory. More importantly, the proposed structure shows great potential for sensing, with a maximum sensitivity of 6.67 THz/RIU. Therefore, our study provides a new method for the development of sensor devices with excellent refractive index sensing.