A terahertz two-wire waveguide with low bending loss

Mbonye, Marx; Mendis, Rajind; Mittleman, Daniel M.
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233506
Academic Journal
We present experimental and theoretical evidence for low loss terahertz pulse propagation along a two-wire waveguide. We find that the mode pattern at the end of the waveguide resembles that of a dipole, consistent with the fundamental transverse-electromagnetic mode of the structure. Compared to the weakly guided Sommerfeld wave of a single wire, this structure exhibits much lower bending losses. We also observe that a commercial 300 Ω two-wire TV-antenna cable can be used for guiding frequency components up to ∼0.2 THz, although they are generally designed to operate only up to about 800 MHz.


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