Browsing by Author "Urzhumov, Yaroslav"
Now showing items 1-8 of 8
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Broadband electromagnetic cloaking with smart metamaterials.
(Nat Commun, 2012)The ability to render objects invisible with a cloak that fits all objects and sizes is a long-standing goal for optical devices. Invisibility devices demonstrated so far typically comprise a rigid structure wrapped around ... -
Complex k band diagrams of 3D metamaterial/photonic crystals.
(Opt Express, 2011-09-26)A finite element method (FEM) for solving a complex valued k(ω) vs. ω dispersion curve of a 3D metamaterial/photonic crystal system is presented. This 3D method is a generalization of a previously reported 2D eigenvalue ... -
Enhancing imaging systems using transformation optics.
(Opt Express, 2010-09-27)We apply the transformation optical technique to modify or improve conventional refractive and gradient index optical imaging devices. In particular, when it is known that a detector will terminate the paths of rays over ... -
Far-field analysis of axially symmetric three-dimensional directional cloaks.
(Opt Express, 2013-04-22)Axisymmetric radiating and scattering structures whose rotational invariance is broken by non-axisymmetric excitations present an important class of problems in electromagnetics. For such problems, a cylindrical ... -
Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
(Nano Lett, 2010-10-13)The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, ... -
Low-loss directional cloaks without superluminal velocity or magnetic response.
(Opt Lett, 2012-11-01)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 large (relative to the wavelength) objects involve ... -
Magnetic metamaterial superlens for increased range wireless power transfer.
(Sci Rep, 2014-01-10)The ability to wirelessly power electrical devices is becoming of greater urgency as a component of energy conservation and sustainability efforts. Due to health and safety concerns, most wireless power transfer (WPT) schemes ... -
Thin low-loss dielectric coatings for free-space cloaking
(2013-05-03)We report stereolithographic polymer-based fabrication and experimental operation of a microwave X-band cloaking device. The device is a relatively thin (about one wavelength thick) shell of an air dielectric composite, ...
