Modes and Pseudo-modes in TE Extraordinary THz Transmission

Suzanna Freer, Miguel Camacho, Sergei A. Kuznetsov, Eve Shalom, Jack Gape, Rafael R. Boix, Miguel Beruete, Miguel Navarro-Cia
2019 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)  
Transverse electric (TE) transmission through dielectric-baked subwavelength slit arrays is inextricably linked to the grounded-dielectric slab TE1 mode, and thus, it depends highly on the electrical thickness of the substrate. We track the influence of the TE1 mode using both TDS measurements and the Method of Moments. For electrically thick dielectric samples, the TE1 mode is in propagation, and hence total transmission occurs (in excess of 0 dB, attributed to collimation), whereas in
more » ... ally thin samples, the TE1 mode is in cutoff. In this regime, the mode still contributes to transmission, and hence is referred to as a pseudo-mode.
doi:10.1109/irmmw-thz.2019.8874462 fatcat:pqr3325o6zanlf4veurjzlb334