The transverse magnetic electromagnetic bound mode in a black phosphorene inserted multilayer dielectric structure

Abstract

The electromagnetic wave of the bound mode along the black phosphorene (BP) interface and the field distribution in a BP inserted planar multilayer dielectric structure have been investigated. The dispersion results indicate that the transverse magnetic surface plasmon wave is a bound mode and anisotropic with different electric field polarization directions. The effective refractive index increases as a function of the incident optical energy. It can also be tuned by the chemical potential and the thickness of the middle dielectric layer. The variable coupling strength between the light and matter based on the BP intraband optical conductivity makes the influence of the thickness of the middle dielectric layer significant or negligible in the lower and higher frequency regimes, respectively. The presented results can be applied to design BP-based promising optoelectronic devices.