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Metasurface-Coated Devices A New Paradigm for Energy-Efficient and Secure 6G Communications

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Document pages: 8 pages

Abstract: The sixth-generation era comes with the challenge of offeringhigh-energy-efficiency and autonomy communications securely. In this direction,we report energy efficiency (EE), energy harvesting (EH), and secureperformance employing power-collecting metasurface-coated devices capable ofsupporting ultra-low-power (ULP) transmissions. Contrary to reconfigurableintelligent surfaces (RIS), where the reflected signal can be combined at thereceiver by being treated as transmitted from a relay, the proposed metasurfacecladdings can be deployed both at the transmitter and receiver sides. Thepassive metasurface-coated devices can achieve ultra-high-EE and EH besides thesignal detection, combined with an enhanced secrecy rate at the legitimate userand or improved spying capabilities of the eavesdroppers under ULPtransmission. To quantify their efficiency, we provide a holistic model for theutilization of the metasurface shells. Building upon the aforementioned model,preliminary simulation results are presented that reveal the unprecedentedsuperiority of the proposed concept compared to RIS. Additionally, we enumeratethe main advantages of the new concept and its role in the 6G wireless world.Finally, possible research directions are discussed.

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