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Proceedings Paper

Air-core terahertz fiber with high birefringence
Author(s): Jing Li; Haibin Chen; Zhi Hong
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Paper Abstract

In this paper, we propose an efficient air-core Terahertz (THz) fiber with high birefringence and low modal absorption loss. The photonic crystal fiber has a triangular-lattice with circular subwavelength air-holes in the microstructured cladding and elliptical subwavelength air-holes in the core. In this structure, the effective index of the core is above that of the cladding, which leads to a better confinement of the field and ensures the low loss characteristic for THz guiding. With elliptical air-holes in the core, the proposed THz fiber exhibits high birefringence. The background medium is the polymer material with low absorption in THz region. The proposed design has been simulated based on the finite element method with anisotropic perfectly matched layers (PML) absorbing boundary condition. Numerical simulations show that with a moderate ellipticity of the elliptical air-holes in the core region, the proposed THz fiber can exhibit high birefringence on a level of 10-2 in a 0.2THz to 2.0THz frequency range. And the THz fiber's guiding loss caused by material absorption can be reduced effectively by the addition of more air holes in the core region.

Paper Details

Date Published: 4 November 2010
PDF: 6 pages
Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542T (4 November 2010); doi: 10.1117/12.869713
Show Author Affiliations
Jing Li, China Jiliang Univ. (China)
Haibin Chen, Xi'An Technological Univ. (China)
Zhi Hong, China Jiliang Univ. (China)

Published in SPIE Proceedings Vol. 7854:
Infrared, Millimeter Wave, and Terahertz Technologies
Cunlin Zhang; Xi-Cheng Zhang; Peter H. Siegel; Li He; Sheng-Cai Shi, Editor(s)

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