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Maximum Willis Coupling in Acoustic Scatterers
Li Quan, Younes Ra'di, Dimitrios Sounas +1
Willis coupling in acoustic materials defines the cross-coupling between strain and velocity, analogous to bianisotropic phenomena in electromagnetics. While these effects have bee…
Coherently Enhanced Wireless Power Transfer
Alex Krasnok, Denis G. Baranov, Andrey Generalov +2
Extraction of electromagnetic energy by an antenna from impinging external radiation is at the basis of wireless communications and power transfer (WPT). The maximum of transferred…
Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control
Younes Ra'di, Dimitrios L. Sounas, Andrea Alu
Graded metasurfaces exploit the local momentum imparted by an impedance gradient to transform the impinging wavefront. This approach suffers from fundamental limits on the overall…
On-Site Wireless Power Generation
Y. Ra'di, B. Chowkwale, C. A. Valagiannopoulos +4
Conventional wireless power transfer systems consist of a microwave power generator and a microwave power receiver separated by some distance. To realize efficient power transfer,…