4 papers
Amplified up-conversion of electromagnetic waves using time-varying metasurfaces
Fedor Kovalev, Stanislav Maslovski, Abdelghafour Abraray +1
Time-varying metamaterials and photonic time crystals offer a powerful route to wave amplification through temporal modulation of material parameters. Here, we experimentally demon…
Mechanically Reconfigurable GRIN Lens Concept for Focusing and Beamforming Applications
K. Kaboutari, X. Liu, A. Abraray +3
This study presents a prospective concept of a mechanically reconfigurable Gradient Index (GRIN) lens for focusing and beamforming applications. The lens is formed by corrugated la…
Chessboard Mushroom-Type Metasurface for Beamforming Applications
A. Abraray, R. Pereira, K. Kaboutari +1
A reconfigurable microwave reflectarray metasurface (MS) is investigated for beamforming applications. The reflected beam direction is changed by applying external dc voltages, whi…
Analytical and numerical modeling of reconfigurable reflecting metasurfaces with capacitive memory
Abdelghafour Abraray, Diogo Nunes, Stanislav Maslovski
In this article, we develop analytical-numerical models for reconfigurable reflecting metasurfaces formed by chessboard-patterned arrays of metallic patches. These patch arrays are…