Abstract
A thin-wall cyclic olefin copolymer (COC) tube terahertz (THz) waveguide was proposed and fabricated for broadband terahertz transmission. A dynamic coating method was developed to prepare highly uniform COC tube waveguide samples with an inner diameter of 2.8 mm and three different wall thicknesses from 33.0 to 58.6 μm. The resonant frequencies and transmission bandwidths were measured by the THz time domain spectroscopy and proven to be adjustable by the wall thickness of the COC tube waveguides. The measured minimum losses of the waveguide sample with the wall thickness of 58.6 μm for the straight and bending transmissions are 0.10 dB/cm and 0.18 dB/cm at 1.05 THz, respectively.
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