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.