Invisibility Cloak | featured news

If you liked last year's bulky invisibility cloaks, you'll love this year's fashionable ultra-thin invisibility wrap — which is just a tenth of a millimeter thick but can still make the objects inside undetectable to microwave scans."This is the first time an ultra-thin cloak has been realized, much thinner than the wavelength," Andrea Alu, a materials-science researcher at the University of Texas...

Mathematicians have determined how to create an invisibility cloak that works for anything that acts like a wave, such as light, sound and particles.

It's one thing to make an object invisible, like Harry Potter's mythical cloak. But scientists have made an entire event impossible to see. They have invented a time masker. Think of it as an art heist that takes place before your eyes and surveillance cameras. You don't see the thief strolling into the museum, taking the painting down or walking away, but he did. It's not just that the thief is invisible - his whole activity is.

Researchers at Cornell University have made an astounding leap forward in cloaking technology. While other teams have been working on what have been traditionally seen as “invisibility cloaks” – using meta-materials to hide an object from visible light — this team has been working on something a bit more ambitious: hiding an actual event in time.

Researchers have demonstrated an idea for an invisibility cloak using calcite, a common crystalline material.