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Loss compensation and super-resolution with excitations at complex frequencies
Seunghwi Kim, Yu-Gui Peng, Simon Yves +1
Abbe diffraction limit fundamentally bounds the resolution of conventional optical imaging and spectroscopic systems. Along the years, several schemes have been introduced to overc…
Smart Radio Environments
Gabriele Gradoni, Marco Di Renzo, Ana Diaz-Rubio +27
This Roadmap takes the reader on a journey through the research in electromagnetic wave propagation control via reconfigurable intelligent surfaces. Meta-surface modelling and desi…
A Topological Design Tool for the Synthesis of Antenna Radiation Patterns
Mirko Barbuto, Mohammad-Ali Miri, Andrea Alù +2
Patch antennas are among the most popular radiating elements, yet their quasi-2-D structure reduces the degrees of freedom available to tailor their radiation pattern. To overcome…
Surface Impedance Modeling of All-Dielectric Metasurfaces
Alessio Monti, Andrea Alù, Alessandro Toscano +1
We develop a simple and reliable analytical model that allows describing the electromagnetic response of all-dielectric metasurfaces consisting of a single-layer array of high-perm…
Scattering Cancellation Technique for Acoustic Spinning Objects
Mohamed Farhat, Sebastien Guenneau, Andrea Alu +1
The scattering cancellation technique (SCT) has proved to be an effective way to render static objects invisible to electromagnetic and acoustic waves. However, rotating cylindrica…
Acoustic meta-atom with maximum Willis coupling
Anton Melnikov, Li Quan, Sebastian Oberst +3
Acoustic metamaterials are structures with exotic acoustic properties, having promising applications in acoustic beam steering, focusing, impedance matching, absorption and isolati…