Practical Cloaking Devices On The Horizon?

August 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: Journalists view co-workers as more ethical than peers, study finds

Related Stories

Light pollution a reason for insect decline

June 20, 2018

Climate change, pesticides and land use changes alone cannot fully explain the decline in insect populations in Germany. Scientists from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) have now discovered ...

Here's a better way to think about identity politics

June 26, 2018

Identity politics has become a phrase of common currency in recent years, yet it is often painfully, and badly, used. Generally, it is wheeled out in a negative context. Take UK environment minister Michael Gove and Tim Farron, ...

Recommended for you

Unusual sound waves discovered in quantum liquids

July 20, 2018

Ordinary sound waves—small oscillations of density—can propagate through all fluids, causing the molecules in the fluid to compress at regular intervals. Now physicists have theoretically shown that in one-dimensional ...

A phonon laser operating at an exceptional point

July 20, 2018

The basic quanta of light (photon) and sound (phonon) are bosonic particles that largely obey similar rules and are in general very good analogs of one another. Physicists have explored this analogy in recent experimental ...

A physics treasure hidden in a wallpaper pattern

July 20, 2018

An international team of scientists has discovered a new, exotic form of insulating material with a metallic surface that could enable more efficient electronics or even quantum computing. The researchers developed a new ...

2 comments

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

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.