Low-loss subwavelength plastic fiber for terahertz waveguiding

Li Jin Chen, Hung Wen Chen, Tzeng Fu Kao, Ja Yu Lu, Chi Kuang Sun

Research output: Contribution to journalArticlepeer-review

331 Citations (Scopus)


We report a simple subwavelength-diameter plastic wire, similar to an optical fiber, for guiding a 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 μm diameter for guiding terahertz waves in the frequency range near 0.3 THz in which the attenuation constant is reduced to of the order of or less than 0.01 cm-1. Direct free-space coupling efficiency as high as 20% can be achieved by use of an off-axis parabolic mirror. Furthermore, all the plastic wires are readily available, with no need for complex or expensive fabrication.

Original languageEnglish
Pages (from-to)308-310
Number of pages3
JournalOptics Letters
Issue number3
Publication statusPublished - 2006 Feb 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Low-loss subwavelength plastic fiber for terahertz waveguiding'. Together they form a unique fingerprint.

Cite this