Broadband amplitude, frequency, and polarization splitter for terahertz frequencies using parallel-plate waveguide technology
Hernandez-Serrano, A. I., Daniel M. Mittleman, and Emma Pickwell-MacPherson. “Broadband amplitude, frequency, and polarization splitter for terahertz frequencies using parallel-plate waveguide technology.” Optics Letters 45, no. 5 (2020): 1208-1211.
In this Letter, we report a broadband frequency/polarization demultiplexer based on parallel-plate waveguides (PPWGs) for terahertz (THz) frequencies. The fabrication and experimental validation of this polarization sensitive demultiplexer is demonstrated for the range from 0.2 to 1 THz. Upgrading the demultiplexer by adding a second demultiplexer stage, a fifty-fifty amplitude splitter is also demonstrated in the same frequency range. The multiplexer is based on a stainless-steel traveling-wave antenna, exhibiting strong mechanical robustness. This unique device exhibits three splitting mechanisms in the same device: amplitude, polarization, and frequency splitting. This is a significant improvement for the next generation of THz passive components for communication purposes.