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Proceedings Paper

Low loss and single mode metal dielectric hybrid-clad waveguides for Terahertz radiation
Author(s): Haisu Li; Shaghik Atakaramians; Boris T. Kuhlmey
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Paper Abstract

Several waveguide solutions based on technologies from both electronics and photonics have been proposed for guiding Terahertz (THz) radiation. Hollow-core dielectric waveguides are one of the best options for guiding THz radiation since the material absorption is almost zero in the air-core. However, these waveguides are usually multimode and have dimensions in the order of a few millimeters. Here we propose a hollow-core waveguide with sub-wavelength scale metallic wires in the cladding for THz guidance. The theoretical studies show that such a hybrid cladding reflects the transverse magnetic (TM) waves and transmits the transverse electric (TE) waves, leading to a waveguide structure that only confines TM modes. The numerical simulations show a pure single mode, single polarization operation window from 0.22 THz to 0.34 THz and 14.8 dB/m propagation loss at 0.29 THz. Compared to a metallic waveguide with similar dimension, the proposed waveguide more than doubles the single mode operation bandwidth with comparable losses. We discuss the effect of optical and structural parameters of the hybrid cladding on the single mode operating window and propagation losses, and suggest methods of fabrication of the waveguide. The design principle of the proposed waveguide can be extended to the mid-inferred spectrum.

Paper Details

Date Published: 22 December 2015
PDF: 8 pages
Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 96680H (22 December 2015); doi: 10.1117/12.2207697
Show Author Affiliations
Haisu Li, The Univ. of Sydney (Australia)
Beijing Jiaotong Univ. (China)
Shaghik Atakaramians, The Univ. of Sydney (Australia)
Boris T. Kuhlmey, The Univ. of Sydney (Australia)

Published in SPIE Proceedings Vol. 9668:
Micro+Nano Materials, Devices, and Systems
Benjamin J. Eggleton; Stefano Palomba, Editor(s)

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