Quasi-optic coupling to a low-loss single-mode THz interconnect with no group velocity dispersion

Summary form only given. We report the first demonstration of efficient quasi-optic coupling of a freely propagating beam of sub-ps THz pulses into a parallel-plate metal waveguide and low-loss, single-mode propagation with almost zero dispersion. This ideal THz interconnect consisting of two parallel conducting plates positioned dose together is made possible due to the presence of the dominant TEM guided model which can propagate at any frequency. This is quite unlike the case of hollow rectangular or circular metallic waveguides or any type of solid dielectric waveguide. Even though TEM propagation is possible in coplanar and coaxial lines, efficient quasi-optic coupling is not possible.