Abstract-Linearly polarized single TM mode terahertz waveguide

Haisu Li, Guobin Ren, Shaghik Atakaramians, Boris T. Kuhlmey, and Shuisheng Jian
https://www.osapublishing.org/ol/abstract.cfm?uri=ol-41-17-4004

We design a hollow-core terahertz (THz) waveguide guiding a single linearly polarized mode. This is achieved using a hybrid cladding, where we introduce a ring of subwavelength structures, including metal wires and air-holes. The wire-based cladding is extremely anisotropic, reflecting only transverse magnetic (TM) modes. The polarization of TM modes is further manipulated by replacing some wires with air-holes. Numerical simulations confirm the guidance of only an 𝑥-polarized TM2 mode over 0.36–0.46 THz in a wavelength-scale core (diameter of 1 mm). The propagation losses are of the order 0.25  dB/cm, with low bend losses <0.3  dB/cm at 0.4 THz for a bend radius of 5 cm.

© 2016 Optical Society of America

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