Subwavelength plastic fiber for terahertz wave guiding

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

doi:10.1117/12.687350

12 October 2006 Subwavelength plastic fiber for terahertz wave guiding

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

Proceedings Volume 6373, Terahertz Physics, Devices, and Systems; 63730F (2006) https://doi.org/10.1117/12.687350
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

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.

Citation Download Citation

Chi-Kuang Sun, Li-Jin Chen, Hung-Wen Chen, and Ja-Yu Lu "Subwavelength plastic fiber for terahertz wave guiding", Proc. SPIE 6373, Terahertz Physics, Devices, and Systems, 63730F (12 October 2006); https://doi.org/10.1117/12.687350

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