Yasith Amarasinghe, Rajind Mendis, Rabi Shrestha, Hichem Guerboukha, Jochen Taiber, Martin Koch & Daniel M. Mittleman
https://www.nature.com/articles/s41598-021-84849-8
The design of antennas for terahertz systems remains a significant challenge. These antennas must provide very high gain to overcome significant free-space path loss, which limits their ability to broadcast or receive a beam over a wide angular range. To circumvent this limitation, here we describe a new device concept, based on the application of quasi-conformal transformation optics to the traditional Luneburg lens. This device offers the possibility for wide-angle beam steering and beam reception over a broad bandwidth, scalable to any frequency band in the THz range.
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