All-dielectric periodic terajet waveguide using an array of coupled cuboids

TL;DR

This paper introduces a novel all-dielectric waveguide design using an array of coupled cuboids to generate and guide terajets at THz frequencies, demonstrating scalable focusing and transport properties through numerical simulations.

Contribution

It presents a new mesoscale cuboid-chain waveguide design utilizing dielectric cubes for terajet generation and guidance, with systematic analysis of air-gap effects on performance.

Findings

Optimal air-gap of 2.5λ0 enhances focusing and guiding.

Numerical simulations confirm effective wave transport.

Design scalable across various frequency ranges.

Abstract

In this paper, the recently proposed technique to produce photonic jets (terajets at THz frequencies) using 3D dielectric cuboids is applied in the design of mesoscale cuboid-chain waveguide. The chains are basically designed with several dielectric cubes with dimensions {\lambda}0 along the x, y and z axes placed periodically along the axial z-axis and separated by an air-gap. Based on this, a systematic study of the focusing properties and wave guiding of this chain is performed when the air-gap between the dielectric cubes is changed from 0.25{\lambda}0 to 2.5{\lambda}0 with the best performance achieved with the latter design. The numerical results of focusing and transport properties are carried out using Finite Integration Technique. The results here presented may be scaled to any frequency ranges such as millimeter, sub-millimeter or optical frequencies.