Practical Cloaking Devices On The Horizon?

Aug 10, 2008

(PhysOrg.com) -- Invisibility cloaks get a step closer to realization, with the demonstration of a new material that can bend (visible) light the 'wrong' way for the first time in three dimensions.

In Nature this week, researchers report a metamaterial that produces negative refraction of visible light, and show that it can be can be easily probed from free space, paving the way for practical optical device applications.

Metamaterials are artificially engineered structures that have properties, such as negative refractive index, not attainable with naturally occurring materials. Only thin, effectively two-dimensional materials have been demonstrated until now, limiting practical applications.

Jason Valentine, Xiang Zhang and colleagues at the University of California, Berkeley create a multilayered, ‘fishnet’ structure which unambiguously exhibits negative refractive index. This straightforward and elegant demonstration enhances our ability to mould and harness light at will.

Read a follow-up story: Invisibility cloak now within sight: scientists

This paper will be published electronically on Nature's website soon. It will not appear in print on 14 August, but at a later date. (DOI: 10.1038/nature07247)

Provided by Nature

Explore further: Novel approach to magnetic measurements atom-by-atom

add to favorites email to friend print save as pdf

Related Stories

Soft design for a sustainable world

Sep 24, 2014

"Around the world at unprecedented rates, people are moving from the country to the city," says Sheila Kennedy, professor of the practice at MIT's Department of Architecture. "But this rapid urbanization is not a one-way ...

Kangaroos win when Aborigines hunt with fire

Aug 04, 2014

Australia's Aboriginal Martu people hunt kangaroos and set small grass fires to catch lizards, as they have for at least 2,000 years. A University of Utah researcher found such man-made disruption boosts ...

Recommended for you

Hide and seek: Sterile neutrinos remain elusive

11 hours ago

The Daya Bay Collaboration, an international group of scientists studying the subtle transformations of subatomic particles called neutrinos, is publishing its first results on the search for a so-called ...

Novel approach to magnetic measurements atom-by-atom

16 hours ago

Having the possibility to measure magnetic properties of materials at atomic precision is one of the important goals of today's experimental physics. Such measurement technique would give engineers and physicists an ultimate ...

Scientists demonstrate Stokes drift principle

19 hours ago

In nature, waves – such as those in the ocean – begin as local oscillations in the water that spread out, ripple fashion, from their point of origin. But fans of Star Trek will recall a different sort of wave pattern: ...

User comments : 2

Adjust slider to filter visible comments by rank

Display comments: newest first

yOnsa
2.5 / 5 (2) Aug 10, 2008
sweet
Eco_R1
5 / 5 (1) Aug 11, 2008
"It will not appear in print on 14 August" ....even the text has a negative refractive index