Wednesday, March 27, 2013

‘Metascreen’ forms ultra-thin invisibility cloak

‘Metascreen’ forms ultra-thin invisibility cloak: The trick: a new, ultrathin layer called a “metascreen,” made by attaching strips of 66-micron-thick copper tape to a 100-micron-thick, flexible polycarbonate film in a fishnet design. It was used to cloak (hide) an 18 cm cylindrical rod from microwaves...

Previous cloaking studies have used metamaterials to refract (bend) the incoming waves around an object. The new “mantle cloaking” method uses instead an ultrathin metallic metascreen to cancel out the waves as they are scattered off the cloaked object...

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