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: Could 'Jedi Putter' be the force golfers need?

add to favorites email to friend print save as pdf

Related Stories

Target exec's departure puts spotlight on CIOs

Mar 06, 2014

The departure of Target's chief information officer in the wake of the company's massive pre-Christmas data breach highlights the increased pressure facing executives who are charged with protecting corpora ...

Nighttime smartphone use zaps workers' energy

Jan 22, 2014

Using a smartphone to cram in more work at night results in less work the next day, indicates new research co-authored by a Michigan State University business scholar.

'Hip-hop' students unfairly targeted, study finds

Jan 10, 2014

Black and Latino "hip-hop" students are disproportionately punished in urban schools, finds a two-year study that sheds light on some of the unfair disciplinary practices newly targeted by the Obama administration.

Recommended for you

Could 'Jedi Putter' be the force golfers need?

Apr 18, 2014

Putting is arguably the most important skill in golf; in fact, it's been described as a game within a game. Now a team of Rice engineering students has devised a training putter that offers golfers audio, ...

Better thermal-imaging lens from waste sulfur

Apr 17, 2014

Sulfur left over from refining fossil fuels can be transformed into cheap, lightweight, plastic lenses for infrared devices, including night-vision goggles, a University of Arizona-led international team ...

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

More news stories

NASA's space station Robonaut finally getting legs

Robonaut, the first out-of-this-world humanoid, is finally getting its space legs. For three years, Robonaut has had to manage from the waist up. This new pair of legs means the experimental robot—now stuck ...

Ex-Apple chief plans mobile phone for India

Former Apple chief executive John Sculley, whose marketing skills helped bring the personal computer to desktops worldwide, says he plans to launch a mobile phone in India to exploit its still largely untapped ...

Filipino tests negative for Middle East virus

A Filipino nurse who tested positive for the Middle East virus has been found free of infection in a subsequent examination after he returned home, Philippine health officials said Saturday.

Egypt archaeologists find ancient writer's tomb

Egypt's minister of antiquities says a team of Spanish archaeologists has discovered two tombs in the southern part of the country, one of them belonging to a writer and containing a trove of artifacts including reed pens ...