Plasmonic Modes of Metallic Slab in Anisotropic Plasma Environment

Plasmonic modes of metallic slab in anisotropic plasma environment have been explored in this manuscript. The impacts of tensorial permittivity of plasma medium on the behavior of plasmonic modes are analyzed. The numerical results show that the plasma parameters and the separation distance between the plates can be used to tune the effective mode index, attenuation, and phase velocity in the certain electromagnetic wave frequency range for lower and higher modes. Additionally, attenuation of the electromagnetic wave for higher plasmonic mode is more dominant as compared to lower mode for plasma frequency as well as separation distance. Furthermore, field distribution for the anisotropic plasma medium is also analyzed to verify the electromagnetic surface wave conditions. It was concluded that anisotropy of plasma dielectric provides an additional degree of freedom over isotropic dielectric to tune the characteristics of plasmon mode. To control over the anisotropic properties of plasma medium is being used to increase the efficiency of nano-plasmonic structure.

Automated summary

In this manuscript, the plasmonic modes of a metallic slab in an anisotropic plasma environment are investigated. The influence of the tensorial permittivity of the plasma medium on the behavior of the plasmonic modes is analyzed. The numerical results demonstrate that by adjusting the plasma parameters and the separation distance between the plates, the effective mode index, attenuation, and phase velocity of the lower and higher modes can be tuned in a certain electromagnetic wave frequency range. Furthermore, it is observed that the attenuation of higher plasmonic modes is more prominent compared to lower modes for both plasma frequency and separation distance. The field distribution of the anisotropic plasma medium is also analyzed to confirm the conditions of the electromagnetic surface wave. The conclusion is that the anisotropy of the plasma dielectric provides an additional degree of freedom to control the characteristics of plasmonic modes, and this control over the anisotropic properties of the plasma medium can lead to increased efficiency of nano-plasmonic structures.