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Proceedings Paper

Subwavelength plastic fiber for terahertz wave guiding
Author(s): Chi-Kuang Sun; Li-Jin Chen; Hung-Wen Chen; Ja-Yu Lu
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Paper Abstract

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.

Paper Details

Date Published: 12 October 2006
PDF: 11 pages
Proc. SPIE 6373, Terahertz Physics, Devices, and Systems, 63730F (12 October 2006); doi: 10.1117/12.687350
Show Author Affiliations
Chi-Kuang Sun, National Taiwan Univ. (Taiwan)
Li-Jin Chen, National Taiwan Univ. (Taiwan)
Hung-Wen Chen, National Taiwan Univ. (Taiwan)
Ja-Yu Lu, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6373:
Terahertz Physics, Devices, and Systems
Mehdi Anwar; Anthony J. DeMaria; Michael S. Shur, Editor(s)

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