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Aug 7, 2010

CLOAKING WITH GLASS AND CERAMICS

Using a type of glass that does not conduct electricity, researchers at   
Michigan Tech and Penn State report discovering a way to capture and   
route rays of visible light around objects, rendering the objects   
invisible. 
Previous attempts to build an "invisibility cloak" have used metals and   
wires. In the research by Michigan Tech engineer Elena Semouchkina and   
colleagues, tiny glass metamaterials were arranged in a cylinder shape   
that produced the magnetic resonance required to bend light waves   
around an object. These resonators are artificial materials with   
properties that do not exist in nature, born of the marriage between   
materials science and electrical engineering.
The researchers are experimenting with other materials, such as ceramic   
resonators, and with other frequencies, such as microwave. The goal is   
to find applications that work at visible light frequencies, says   
Semouchkina. 

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