In this letter, we propose a novel single-layer reconfigurable transmissive metagrating based on plasma discharges. Each unit-cell consists of two side-by-side core–shell cylinders, with a tunable plasma core and a high-index dielectric shell. The structure is modeled using a free-electron plasma permittivity with an adjustable plasma frequency. Analytical and numerical results show that the main transmission lobe can be switched between −41°, 0°, and 41° by tuning the plasma frequencies. Transmission efficiency remains above 80% at broadside and 90% in the steered direction. This tunability enables effective directional control with low reflection and high overall power efficiency.
Alijani, M.G.H., Monti, A., Vellucci, S., Barbuto, M., Toscano, A., Bilotti, F. (2025). Tunable transmissive metagratings using single-layer cylindrical plasma discharges. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 24(11), 4318-4322 [10.1109/lawp.2025.3592822].
Tunable transmissive metagratings using single-layer cylindrical plasma discharges
Monti, Alessio;Vellucci, Stefano;Barbuto, Mirko;Toscano, Alessandro;Bilotti, Filiberto
2025-01-01
Abstract
In this letter, we propose a novel single-layer reconfigurable transmissive metagrating based on plasma discharges. Each unit-cell consists of two side-by-side core–shell cylinders, with a tunable plasma core and a high-index dielectric shell. The structure is modeled using a free-electron plasma permittivity with an adjustable plasma frequency. Analytical and numerical results show that the main transmission lobe can be switched between −41°, 0°, and 41° by tuning the plasma frequencies. Transmission efficiency remains above 80% at broadside and 90% in the steered direction. This tunability enables effective directional control with low reflection and high overall power efficiency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
