Non-Metallic 3D-Printed Packages Based on Dielectric Slot Waveguides

In the terahertz domain, 3D printing technologies have demonstrated potential applications for the efficient and flexible design of waveguides. Besides, all-dielectric waveguides have shown high coupling efficiency over a broad bandwidth, but a tapered spike is required for coupling to a hollow waveguide. Notably, dielectric slot waveguides offer low loss through strong field confinement in a low-index material, providing taperless interfacing. By combining the 3D printing technique and the slot waveguide, we propose a novel solution for terahertz waveguide packaging characterized by low loss, reduced cost, and ease of fabrication.