Journal ArticleDOI
Cloaking Devices, Electromagnetic Wormholes, and Transformation Optics
TLDR
Recent theoretical and experimental progress on making objects invisible to detection by electromagnetic waves is described and ideas for devices that would once have seemed fanciful may now be at least approximately implemented physically using a new class of artificially structured materials called metamaterials.Abstract:
We describe recent theoretical and experimental progress on making objects invisible to detection by electromagnetic waves. Ideas for devices that would once have seemed fanciful may now be at least approximately implemented physically using a new class of artificially structured materials called metamaterials. Maxwell's equations have transformation laws that allow for the design of electromagnetic material parameters that steer light around a hidden region, returning it to its original path on the far side. Not only would observers be unaware of the contents of the hidden region, they would not even be aware that something was being hidden. An object contained in the hidden region, which would have no shadow, is said to be cloaked. Proposals for, and even experimental implementations of, such cloaking devices have received the most attention, but other designs having striking effects on wave propagation are possible. All of these designs are initially based on the transformation laws of the equations that govern wave propagation but, due to the singular parameters that give rise to the desired effects, care needs to be taken in formulating and analyzing physically meaningful solutions. We recount the recent history of the subject and discuss some of the mathematical and physical issues involved.read more
Citations
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Journal ArticleDOI
On Electromagnetic Scattering from a Penetrable Corner
Hongyu Liu,Jingni Xiao +1 more
TL;DR: In this article, it was shown that an EM medium whose support has a right corner, scatters every pair of incident EM fields, excluding a possible class of EM fields which are of very particular forms.
Journal ArticleDOI
Exterior cloaking with active sources in two dimensional acoustics
TL;DR: In this paper, the authors cloak a region from a known incident wave by surrounding the region with three or more devices that cancel out the field in the cloaked region without significantly radiating waves.
Journal ArticleDOI
Mathematical analysis and time-domain finite element simulation of carpet cloak ∗
TL;DR: The well-posedness of the model is first proved, and then a finite element time-domain method is developed for solving this model, which is the first mathematical analysis carried out for the carpet cloak model.
Journal ArticleDOI
Full and Partial Cloaking in Electromagnetic Scattering
TL;DR: In this paper, two regularized transformation-optics cloaking schemes for electromagnetic (EM) waves are proposed based on the blowup construction with the generating sets being, respectively, a generic curve and a planar subset.
Journal ArticleDOI
An efficient plate heater with uniform surface temperature engineered with effective thermal materials
TL;DR: This work designs an efficient plate heater that can transiently achieve a large surface of uniform temperature powered by a small thermal source and takes advantage of an advanced functional material system to guide the heat flux to achieve the desired temperature heating profile.
References
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Partial Differential Equations
TL;DR: In this paper, the authors present a theory for linear PDEs: Sobolev spaces Second-order elliptic equations Linear evolution equations, Hamilton-Jacobi equations and systems of conservation laws.
Journal ArticleDOI
Negative Refraction Makes a Perfect Lens
TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
Journal ArticleDOI
Controlling Electromagnetic Fields
TL;DR: This work shows how electromagnetic fields can be redirected at will and proposes a design strategy that has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.
Journal ArticleDOI
Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.