426 citations · 1.4k across the 15 of their papers we have counts for
8 papers · 1 filter
An Analysis of Beamed Wireless Power Transfer in the Fresnel Zone Using a Dynamic, Metasurface Aperture
David R. Smith, Vinay R. Gowda, Okan Yurduseven +4
Wireless power transfer (WPT) has been an active topic of research, with a number of WPT schemes implemented in the near-field (coupling) and far-field (radiation) regimes. Here, w…
Low-loss directional cloaks without superluminal velocity or magnetic response
Yaroslav Urzhumov, David R. Smith
The possibility of making an optically large (many wavelengths in diameter) object appear invisible has been a subject of many recent studies. Exact invisibility scenarios for larg…
Electronically reconfigurable metal-on-silicon metamaterial
Yaroslav Urzhumov, Jae Seung Lee, Talmage Tyler +5
Reconfigurable metamaterial-based apertures can play a unique role in both imaging and in beam-forming applications, where current technology relies mostly on the fabrication and i…
Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves
Yaroslav Urzhumov, Nathan Landy, David R. Smith
We propose a generalization of the two-dimensional eikonal-limit cloak derived from a conformal transformation to three dimensions. The proposed cloak is a spherical shell composed…
Magnetic levitation of metamaterial bodies enhanced with magnetostatic surface resonances
Yaroslav Urzhumov, Wenchen Chen, Chris Bingham +2
We propose that macroscopic objects built from negative-permeability metamaterials may experience resonantly enhanced magnetic force in low-frequency magnetic fields. Resonant enha…
Flat-face approximations of invisibility cloaks with planar metamaterial layers
Oliver Paul, Yaroslav Urzhumov, Christoffer Elsen +2
Transformation optics (TO) is a powerful tool for the design of artiffcial materials with unprecedented optical properties. Here, we propose the approximation of TO structures of a…