Single-Mode Rib Waveguide for the Terahertz Range Using 3D Printed Alumina

In recent years, all-dielectric waveguides have emerged as a promising candidate platform for future integrated terahertz technologies. Inspired by optical photonics, many of these technologies are limited to planar waveguides and are reliant upon advanced mask-based etching techniques for fabrication, which incur significant costs. Instead, we propose a non-planar platform based upon an all-dielectric single mode rib waveguide constituted from 3D printed alumina. With an experimentally verified fractional bandwidth exceeding 40% and acceptable loss, we believe this is a practical alternative waveguide platform for sensing and communications applications.