I can easily imagine the things I could do if I had an invisibility cloak. However, the only solid objects I have ever seen disappear are the Statue of Liberty* and one quick-footed blind date. Soon, thanks to new metamaterials and fabrication techniques, we may all get a glimpse at the invisible.

Metamaterials

A team led by scientists at Duke University's Pratt School of Engineering has demonstrated the first working "invisibility cloak" using metamaterials. Metamaterials are blends of man-made composites that exhibit properties not found in nature.

Making an Invisibility Cloak

To make an invisibility cloak, surround an object with metamaterials (the outer shell in the image below). Assemble the metamaterials in precisely the right fashion and light waves that pass through the metamaterials will bend around the object, like water flowing undisturbed around a rock.

How will this technology be used?

Many practical uses exist for materials that can precisely control the paths of light, sound and harmful radiation. There are just as many sinister applications that come to mind for a cloaking device.

The Invisibility Cloak is another impossible product made possible by rapidly advancing technologies and a better understanding of our universe. It would benefit the public to readily address the social impact of invisibility before it materializes in real applications.

 

* Making the Statue of Liberty disappear on live television in 1983 is one of David Copperfield's most remembered tricks. The illusion was a creation of Jim Steinmeyer and is still a closely guarded secret.