Exploring THz hollow-core fiber designs manufactured by 3D printing

In this paper we demonstrate the terahertz propagation characteristics of 3D printed hollow core fibers with inner capillaries. The fibers were numerically characterized using a beam propagation method software. The guidance is supported by antiresonant effect and the spectral transmission was evaluated until 1.6 THz. Special designs were proposed exploring the versatility of 3D printing technique. The potential application of these THz waveguides as a refractometer is presented.