Subwavelength plastic fiber for terahertz wave guiding

Chi Kuang Sun, Li Jin Chen, Hung Wen Chen, Ja-Yu Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We report a simple subwavelength-diameter plastic wire, similar to an optical fiber, for guiding terahertz wave with a low attenuation constant. With a large wavelength-to-fiber-core ratio, the fractional power delivered inside the lossy core is reduced, thus lowering the effective fiber attenuation constant. In our experiment, we adopt a polyethylene fiber with a 200-500 μm diameter for guiding terahertz waves in the frequency range of 0.2-0.5 THz in which the attenuation constant is reduced to the order of or less than 0.01 cm-1. Direct free-space coupling efficiency, as high as 20%, can be achieved by using an off-axis parabolic mirror. Furthermore, all the plastic wires are easily available in our daily life without complex processes and expensive costs.

Original languageEnglish
Title of host publicationTerahertz Physics, Devices, and Systems
Publication statusPublished - 2006 Dec 1
EventTerahertz Physics, Devices, and Systems - Boston, MA, United States
Duration: 2006 Oct 22006 Oct 4

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherTerahertz Physics, Devices, and Systems
Country/TerritoryUnited States
CityBoston, MA

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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