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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 1898–1903

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

Oleg Mitrofanov and James A. Harrington  »View Author Affiliations

Optics Express, Vol. 18, Issue 3, pp. 1898-1903 (2010)

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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.

© 2010 OSA

OCIS Codes
(230.7370) Optical devices : Waveguides
(320.0320) Ultrafast optics : Ultrafast optics
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Optical Devices

Original Manuscript: November 10, 2009
Revised Manuscript: December 4, 2009
Manuscript Accepted: December 5, 2009
Published: January 15, 2010

Oleg Mitrofanov and James A. Harrington, "Dielectric-lined cylindrical metallic THz waveguides: mode structure and dispersion," Opt. Express 18, 1898-1903 (2010)

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