December 1, 2014
What will you do if you are able to "disappear" or "invisible"?
A specially designed metamaterial may help you realize this. Prof. Sir John Pendry explained the idea in an article "Controlling Electromagnetic Fields" in 2006:
"Using the freedom of design that metamaterials provide, we show how electromagnetic fields can be redirected at will and propose a design strategy. The conserved fields—electric displacement field D, magnetic induction field B, and Poynting vector B—are all displaced in a consistent manner. A simple illustration is given of the cloaking of a proscribed volume of space to exclude completely all electromagnetic fields. Our work has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields."
More about Prof. Sir John Pendry, Imperial Collage
Today’s physics news: Sir John Pendry awarded Newton Medal, IOP
A nice article can be found here: Metamaterials and the Science of Invisibility, the Quantumtunnel
A simple drawing illustrate the basic principle here:
Complete story can be found: INVISIBILITY CLOAKS: NOW YOU SEE IT, NOW YOU DON’T.
But how metamaterials related to visibility? Listen to Prof. John Pendry at Youtube:
Btw, Prof. Howell and his research group at the University of Rochester discovered a cloaking trick with only four lenses. They called it "the Rochester Clock":
image source: Improved invisibility cloak tames light
