New ‘Active’ Invisibility Cloak Shields Across Light Frequencies

Back in 2006, scientists developed the first invisibility cloak, but it wasn’t yet able to make an object appear invisible to human vision. Now, a new type of invisibility cloak takes us one step closer to that goal.

So far, scientists have developed more than 10 cloaking devices, and the latest invisibility cloak is thinner model using “active” technology or electric power. Invented by University of Texas at Austin scientists, the new cloak enables more effective shielding of an object at a wider variety of light frequencies. 

For example, an object invisible in red light would also be invisible in blue light; with previous cloaks, an object would disappear in red light, but appear in blue light, as explained in the team’s recent research paper on The Physical Review X.  Read more…

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