Terahertz Antiresonant- Reflecting-Hollow-Waveguide-Based Directional Coupler Operating at Antiresonant Frequencies
Journal
OSA Optics Express
Journal Volume
36
Journal Issue
18
Pages
3590–3592
Date Issued
2011-09
Author(s)
Abstract
We report a particular coupling phenomenon occurring in the directional coupler composed of two touching terahertz antiresonant reflecting hollow waveguides. Unlike conventional directional couplers where one even system mode and one odd system mode are excited, numerical results indicate that three (one even and two odd) system modes participate in the power transfer process at the antiresonant frequencies. As a result, the coupling length can be significantly reduced, and it is shown here to be less than 300 wavelengths.
SDGs
Type
journal article