Application of Ray Model for Terahertz Transmission Simulations of Tube Waveguide

Abstract

Terahertz (THz) transmission simulations play an important role in THz technology researches, especially for the structural design of a THz waveguide. Ray model takes into account both structure parameter of waveguide and the divergence angle of beam light and could be an alternative way for THz transmission behavior simulations. In this paper, the ray model is used to calculate the transmission loss of tube waveguide, and the simulated transmission losses are presented to compare with the results calculated by COMSOL. The suitable THz frequency range of ray model is discussed by analyzing the transmission loss spectra of tube waveguides with various core sizes. The credibility of ray model on terahertz transmission simulations is demonstrated based on the experimental results tested by THz-TDS and calculated results.

Optimization of strip-based hybrid plasmonic terahertz waveguide with distributed Bragg reflector layers

“…Further, the guided ray path of the waveguide is shown in Fig. 4 However, the ray model model is used to calculate the transmission loss of a waveguide 40 . The ray model calculation is initiated by evaluating the reflectance, R, at angle θz.…”

“…The ray model calculation is initiated by evaluating the reflectance, R, at angle θz. The transmission loss, α is given 8 , 40 , 41 as α=1−R2W tan(θz),where R is reflectance, W is the width of core for waveguide, and θz is measured from normal to the surface θz=sin−1(unkT),uT=(n2k2−β2)12.…”

“…4 However, the ray model model is used to calculate the transmission loss of a waveguide. 40 The ray model calculation is initiated by evaluating the reflectance, R, at angle θ z . The transmission loss, α is given 8,40,41 as E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 1 4 ; 1 1 6 ; 3 5 9 where R is reflectance, W is the width of core for waveguide, and θ z is measured from normal to the surface E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 1 5 ; 1 1 6 ; 5 4 4…”