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Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion

Mitrofanov, O.; Harrington, J.A.; (2010) Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion. Optics Express , 18 (3) pp. 1898-1903. 10.1364/OE.18.001898. Gold open access

Abstract

Thin dielectric layers deposited on the inner surface of hollow cylindrical metallic waveguides for Terahertz (THz) waves reduce transmission losses below 1 dB/m. Impact of the dielectric layer on the waveguide dispersion is experimentally investigated by near-field mapping of guided short THz pulses at the input and the output of the waveguide. We obtain dispersion characteristics for the low-loss waveguide modes, the linearly-polarized HE11 mode and the TE01 mode, and compare the experimental results to the metallic waveguide dispersion. The additional dispersion due to the dielectric layer is found to be small for the HE11 mode and the phase velocity is primarily determined by the waveguide radius.

Type:Article
Title:Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion
Open access status:An open access publication
DOI:10.1364/OE.18.001898
Publisher version:http://dx.doi.org/10.1364/OE.18.001898
Language:English
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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