Abstract
We report efficient quasi-optic coupling of a freely propagating beam of
terahertz (THz) pulses into a parallel-plate copper waveguide (with a plate
separation of ) and subsequent low-loss, single-TEM-mode propagation with virtually
no group-velocity dispersion. Undistorted, low-loss propagation of the incoming
0.3-ps FWHM THz pulses was observed within the bandwidth from 0.1 to 4 THz
for a length of 24.4 mm. We compare experimentally derived
values for the absorption and phase velocity with theory to show consistency.
This demonstration is direct proof of the excellent performance of the parallel-plate
waveguide as a wideband THz interconnect.
© 2001 Optical Society of America
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