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Scientist create laser which turns opaque materials invisible

Scientists have developed a cloaking device that makes opaque materials invisible.

The new research uses light waves from lasers and can be applied to different kinds of waves and could be used on sounds waves as well as light, the report.

Stefan Rotter, from Technische Universitat Wien, in Austria, said: "Complex materials such as a sugar cube are opaque, because light waves inside them are scattered multiple times.

"A light wave can enter and exit the object but will never pass through the medium on a straight line. Instead, it is scattered into all possible directions."

Over the years there have been many attempts at creating a "cloak of invisibility" but now it seems the product is on the right track.

Andre Brandstotter, one of the authors of the study, said: "We did not want to reroute the light waves, nor did we want to restore them with additional displays.

"Our goals was to guide the original light wave through the object, as if the object was not there at all.

"This sounds strange, but with certain materials and using our special wave technology, it is indeed possible."

To make the laser shine, the energy needed has to be supplied by means of a pump beam otherwise, the laser material behaves just like any other material.

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