Federico Machado, Przemysław Zagrajek, Vicente Ferrando, Juan A. Monsoriu, Walter D. Furlan
https://ieeexplore.ieee.org/document/8550797
We present a novel method for experimentally generating multiplexed THz vortex beams by using a single three-dimensional printed element that combines a set of radially distributed spiral phase plates, and a binary focusing Fresnel lens. With this element, we have experimentally demonstrated that THz multiplexing can be tailored to fit within a small space on an optical bench. Results are presented beside numerical simulations, demonstrating the robust nature of the experimental method.
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