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Curves bring invisibility into focus

  November 24/December 1, 2008
Map the mathematics of invisibility onto curved shapes and you have a route to making invisibility cloaks that work across a wide range of light wavelengths.

The theoretical study applies the light-bending equations that define proposed invisibility cloaks to non-Euclidean, or curved, geometry. Previously designed invisibility cloaks would shield objects from only some colors of light.

The study could make it easier to extend invisibility cloaks to the full visible spectrum, and shows that the exotic materials needed to make invisibility cloaks might be easier to make than previously thought.

Research paper:
Broadband Invisibility by Non-Euclidean Cloaking
Science, published online November 20, 2008

Researchers' homepages:
Ulf Leonhardt
Tomás Tyc

Related stories and briefs:
Reversing time promises invisibility -- related research
Negative refraction gets visible -- related research

Further info:
View from the High Ground: ICL's John Pendry -- an interview with the inventor of negative index of refraction materials

Back to TRN November 24/December 1, 2008

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