Tuesday 9 June 2020

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.

 



"To characterize the proposed demultiplexer, we use the Terapulse 4000 THz-TDS spectrometer from TeraView Ltd. with a spectral resolution of 4.5 GHz in the configuration shown in Fig. 2. This setup allows for the angle variation between the exit face of the demultiplexer and the receiver. An aperture size of 2.5 mm is placed in front of the receiver in order to improve the spatial resolution. In this Letter, we study two demultiplexers with two different values of the plate spacing in order to highlight the tunability of the device. In Fig. 3, the experimental results for the two demultiplexers are presented for both TE1 and TEM modes. "

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