Plasmonic Characteristics of LiF Filled Slab Waveguide in Isotropic Plasma Environment

This study explores the behavior of the SPPs mode propagating along a plasma-LiF-plasma planar waveguide structure. Real
and imaginary parts of LiF permittivity are analyzed in the THz frequency range. Furthermore, the dependence of effective
mode index, propagation length, permittivity of LiF, phase velocity and normalized propagation for different collisional
frequencies, plasma frequencies, and LiF thickness are analyzed in the THz frequency spectrum. Based on the calculated
numerical results, it is reported that different characteristics of electromagnetic surface waves are strongly influenced by
physical parameters of isotropic plasma and LiF permittivity. The proposed waveguide scheme can be used in plasmonic
sector for the development of novel plasma and LiF-based nano-plasmonic devices and making it ideal for high-performance
optical communication and sensing applications in the THz frequency regime.