Abstract

We propose a highly birefringent terahertz (THz) waveguide, which is formed with two touching subwavelength polymer wires. The waveguide can provide a high modal birefringence larger than 0.01 over a wide frequency range, and a maximum birefringence up to 0.0525 is achieved when the waveguide is made of Topas. Different from other THz birefringent waveguides, a simple scaling rule exists for the proposed birefringent waveguide so that the waveguide can be designed easily for any desired operation frequency to obtain the maximum birefringence. Moreover, when the maximum birefringence takes place, a high coupling efficiency of 93%, a low absorption loss of 0.04 and 0.03 cm⁻¹ for x- and y-polarizations, and a negligible bending loss are demonstrated in our simulations. Finally, the influence of material index is further examined. It is found that as the refractive index of the waveguide material increases, the magnitude of birefringence increases as well, while the frequency at which the maximum birefringence occurs will shift toward the lower region.

Hybrid metal wire–dielectric terahertz waveguides: challenges and opportunities [Invited]

Andrey Markov, Hichem Guerboukha, and Maksim Skorobogatiy
J. Opt. Soc. Am. B 31(11) 2587-2600 (2014)

Highly controllable form birefringence in subwavelength-period grating structures fabricated by imprinting onpolarization-sensitive liquid crystalline polymers

Hiroshi Ono, Masaya Nishi, Tomoyuki Sasaki, Kohei Noda, Makoto Okada, Shinji Matsui, and Nobuhiro Kawatsuki
J. Opt. Soc. Am. B 29(9) 2386-2391 (2012)

Terahertz pulse propagation in 3D-printed waveguide with metal wires component

Nurfina Yudasari, Jessienta Anthony, and Rainer Leonhardt
Opt. Express 22(21) 26042-26054 (2014)

Silicon nitride based photonic crystal fiber with highly improved birefringence for low loss terahertz propagation

Hanie Kaveh, Fazel Jahangiri, and Tahereh Amini
Opt. Continuum 1(2) 388-398 (2022)

Tapered dual elliptical plasmon waveguides as highly efficient terahertz connectors between approximate plate waveguides and two-wire waveguides

Da Teng, Qing Cao, Shuang Li, and Hua Gao
J. Opt. Soc. Am. A 31(2) 268-273 (2014)