Researchers unveil new invisibility cloak

Researchers at the University of Austin at Texas have revealed an ultra-thin invisibility cloak which has the ability to hide objects.

Professor Andrea Alu, from the university, told the BBC: “Our active cloak is a completely new concept and design…If you want to make an object transparent at all angles and over broad bandwidths, this is a good solution.”

It is still a far cry from the much-desired Harry Potter style cloak which features in JK Rowling’s fantasy world however, as it is not always effective at concealing objects. “If you suppress scattering in one range, you need to pay the price, with interest, in some other range,” Professor Alu said.

As a result of this, the invisibility cloak sometimes makes the objects more visible as opposed to less. The technology is still in the early stages of development, but the university are looking into making it available at some point.

This is not the only recent attempt at making such a cloak. Professor David Smith of Duke University made the first cloak back in 2006, but admitted its effectiveness was limited to certain types of objects.

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