Browsing by Author "Urzhumov, Y"
Now showing items 1-11 of 11
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Acoustic cloaking transformations from attainable material properties
(New Journal of Physics, 2010-07-12)We propose a general methodology and a set of practical recipes for the construction of ultra-broadband acoustic cloaks-structures that can render themselves and a concealed object undetectable by means of acoustic scattering. ... -
Active negative-index metamaterial powered by an electron beam
(Physical Review B - Condensed Matter and Materials Physics, 2012-08-21)An active negative index metamaterial that derives its gain from an electron beam is introduced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a periodic array of holes shaped as ... -
Characterization of high order modes of plasmonic antenna formed by nanoparticle/thin film hybrid structures
(Proceedings of SPIE - The International Society for Optical Engineering, 2012-05-04)The plasmonic modes of a nano-antenna formed by a nanoparticle/thin film hybrid system are investigated. Plasmonic nano-antennas are well-known for their capabilities to concentrate electromagnetic wave into extreme small ... -
Construction of invisibility cloaks of arbitrary shape and size using planar layers of metamaterials
(Journal of Applied Physics, 2012-06-15)Transformation optics (TO) is a powerful tool for the design of electromagnetic and optical devices with novel functionality derived from the unusual properties of the transformation media. In general, the fabrication of ... -
Electronically reconfigurable metal-on-silicon metamaterial
(Physical Review B - Condensed Matter and Materials Physics, 2012-08-08)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 integration of large detector or antenna ... -
Isotropic-medium three-dimensional cloaks for acoustic and electromagnetic waves
(Journal of Applied Physics, 2012-03-01)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 of only isotropic media; it operates in ... -
Magnetic levitation of metamaterial bodies enhanced with magnetostatic surface resonances
(Physical Review B - Condensed Matter and Materials Physics, 2012-02-27)We propose that macroscopic objects built from negative-permeability metamaterials may experience resonantly enhanced magnetic force in low-frequency magnetic fields. Resonant enhancement of the time-averaged force originates ... -
Magnetic superlens-enhanced inductive coupling for wireless power transfer
(Journal of Applied Physics, 2012-03-15)We investigate numerically the use of a negative-permeability perfect lens for enhancing wireless power transfer between two current carrying coils. The negative permeability slab serves to focus the flux generated in the ... -
Metamaterial-enhanced coupling between magnetic dipoles for efficient wireless power transfer
(Physical Review B - Condensed Matter and Materials Physics, 2011-05-18)Nonradiative coupling between conductive coils is a candidate mechanism for wireless energy transfer applications. In this paper we propose a power relay system based on a near-field metamaterial superlens and present a ... -
Nonlinear oscillator metamaterial model: numerical and experimental verification.
(Opt Express, 2011-04-25)We verify numerically and experimentally the accuracy of an analytical model used to derive the effective nonlinear susceptibilities of a varactor-loaded split ring resonator (VLSRR) magnetic medium. For the numerical validation, ... -
Probing the ultimate limits of plasmonic enhancement.
(Science, 2012-08-31)Metals support surface plasmons at optical wavelengths and have the ability to localize light to subwavelength regions. The field enhancements that occur in these regions set the ultimate limitations on a wide range of nonlinear ...
