Comparison of the lowest order transverse electric (TE1) and transverse magnetic (TEM) modes of the parallel plate waveguide for terahertz pulse applications.
We present a comprehensive experimental study comparing the propagation characteristics of the virtually unknown TE(1) mode to the well known TEM mode of the parallel plate waveguide (PPWG) for THz pulse applications. We demonstrate that it is possible to overcome the undesirable effects caused by the TE(1) mode's inherent low frequency cutoff, making it a viable THz wave guiding option, and that for certain applications, the TE(1) mode may even be more desirable than the TEM mode. This study presents a whole new dimension to the THz technological capabilities offered by the PPWG, via the possible use of the TE(1) mode.
Optics express