Research on coupling properties of weyl semimetals based on attenuated total internal reflection
Weyl semimetals(WSMs)have unique bulk energy band structures and non-trivial surface states.The rev-elation and study of their optical properties are of great significance for understanding this kind of materials and expanding related applications.In order to explore the interaction between light and WSM,an attenuated total internal reflection structure is proposed to study the dispersion and coupling properties of WSM.Starting from the dielectric function ten-sor,the anisotropic transmission matrix is used to solve Maxwell's equations,and the Fresnel reflection coefficient is ob-tained to study the dispersion properties of WSM.On this basis,a polar crystal film with a subwavelength thickness is introduced,and the hybrid dispersion curve is obtained through the co-excitation of the dielectric function epsilon-near-ze-ro(ENZ)mode and the surface plasmon polaritons.The findings show that both high-frequency and low-frequency bran-ches of the dispersion relation exhibit strong coupling at the anti-crossing point.The WSM-based coupled hybrid mode has the characteristics of high propagation characteristics and subwavelength light confinement,which can provide a theo-retical basis for the preparation and application of future infrared optoelectronic devices.
attenuated total internal reflectionweyl semimetalsepsilon-near-zerocoupling
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