Abstract
The unique transport behavior of surface plasmons confined in the xy-plane is explored using different transition frequencies for different crystallographic axes of black phosphorus (BP). Electromagnetic simulations reveal that the proportion of intraband and interband electron motion within the two-dimensional (2D) BP governs the propagation state of surface plasmons. We illustrate the topological transformation in the dispersion curve of 2D BP that can lead to changes in the surface plasmon propagation state. Moreover, the different dispersion relations have been tuned by changing the electron doping concentration of 2D BP that can be applied to manipulate the propagation direction of surface plasmons. Our design offers a promising platform for plasma control applications in the field of optics.
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