New invisibility cloak hides in the fog

Simple scheme uses cloudy environment to mask object

CLOUDED IN SECRECY  A newly developed invisibility cloak (right) can hide objects in a hazy medium such as fog or frosted glass, as shown in an illustration. At right, the cloak wraps light around an object to fill in the gap that would otherwise appear as a dark shadow (left). The technique works because, unlike in air, light takes a long, pinball-like trip when traveling through such a medium (light shown as red streaks bouncing off blue particles in magnifying glass).

R. Schittny/Karlsruhe Institute of Technology

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