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

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.

Automated summary

In this study, a tunable dual-plasmon-induced transparency (PIT) in the mid-infrared region was achieved using a new material structure. The dual PIT effect was regulated by changing the carrier concentration, and the effectiveness of the structure was validated through numerical simulations. The proposed structure shows great potential for sensing applications.