Silver-Coated Teflon Tubes for Waveguiding at 1–2 THz

Miguel Navarro-Cía, Jeffrey E. Melzer, James A. Harrington, Oleg Mitrofanov

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


Realization of single-mode low-loss waveguides for 1.0–2.0 THz remains a challenging problem due to large absorption in most dielectrics and ohmic losses in metals. To address this problem, we investigate dielectric-lined hollow metallic waveguides fabricated by coating 1-mm diameter 38-μm-thick polytetrafluoroethylene tubes with silver. These waveguides support a hybrid HE11 mode, which exhibits low attenuation and low dispersion. Quasi-single-mode propagation is achieved in the band of 1.0–1.6 THz, in which the hybrid HE11 mode is supported by the waveguide. In this band, the experimentally measured loss is ~20 dB/m (~0.046 cm−1), whereas the numerically computed loss is ~7 dB/m (~0.016 cm−1). The difference is attributed to additional losses in the dielectric layer, which can be reduced by using alternative polymers.

Original languageEnglish (US)
Pages (from-to)542-555
Number of pages14
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Issue number6
StatePublished - Jun 1 2015

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


  • Near-field time-domain microscopy
  • Terahertz imaging
  • Terahertz spectroscopy
  • Terahertz waveguide
  • Ultrafast measurement


Dive into the research topics of 'Silver-Coated Teflon Tubes for Waveguiding at 1–2 THz'. Together they form a unique fingerprint.

Cite this