Editing Cloaking device (section)

===Metascreen===
A prototype Metascreen is a claimed cloaking device, which is just few [[micrometers]] thick and to a limited extent can hide [[Three-dimensional space|3D]] objects from microwaves in their natural environment, in their natural positions, in all directions, and from all of the observer's positions. It was prepared at the [[University of Texas at Austin]] by Professor [[Andrea Alù]].<ref name=physicsworld.com>{{cite web|url=http://physicsworld.com/cws/article/news/2013/mar/28/ultrathin-metascreen-forms-latest-invisibility-cloak|work=PhysicsWorld.com|date=28 March 2013|title=Ultrathin "metascreen" forms latest invisibility cloak|author=Tim Wogan|url-status=live|archive-url=https://web.archive.org/web/20130817232220/http://physicsworld.com/cws/article/news/2013/mar/28/ultrathin-metascreen-forms-latest-invisibility-cloak|archive-date=17 August 2013}}</ref>

The metascreen consisted of a 66 micrometre thick polycarbonate film supporting an arrangement of 20 micrometer thick copper strips that resembled a [[fishing net]].  In the experiment, when the metascreen was hit by 3.6&nbsp;GHz microwaves, it re-radiated microwaves of the same frequency that were out of phase, thus cancelling out reflections from the object being hidden.<ref name=physicsworld.com/>  The device only cancelled out the scattering of microwaves in the first order.<ref name=physicsworld.com/> The same researchers published a paper on "[[Theories of cloaking#Plasmonic cover|plasmonic cloaking]]" the previous year.<ref>http://iopscience.iop.org/1367-2630 New Journal of Physics, March 2013.</ref>