Science Daily February 15, 2022
Terahertz waveguides are required to provide versatile signal-processing functionalities. Despite fundamental components they typically rely on complex hybridization, in turn making it extremely challenging to go beyond the most elementary functions. An international team of researchers (Canada, Italy, Germany) has proposed a universal approach, in which multiscale-structured Bragg gratings can be directly etched on metal-wires. They designed a four-wire waveguide geometry, amenable to support the low-loss and low-dispersion propagation of polarization-division multiplexed terahertz signals. By engraving on the wires judiciously designed Bragg gratings based on multiscale structures, they demonstrated that it is possible to independently manipulate two polarization-division multiplexed terahertz signals. According to the researchers this platform opens exciting new perspectives for exploiting the polarization degree of freedom and ultimately boosting the capacity and spectral efficiency of future terahertz networks…read more. Open Access TECHNICAL ARTICLE
Geometry and fundamental TEM modes of the four-wire waveguide (FWWG). Credit: Nature Communications volume 13, Article number: 741 (2022)Â