News & Information for Technology Purchasers NewsFactor Sites:       NewsFactor.com     Enterprise Security Today     CRM Daily     Business Report     Sci-Tech Today  
   
Home Enterprise I.T. Cloud Computing Applications Hardware More Topics...
Build Apps 5x Faster
For Half the Cost Enterprise Cloud Computing
On Force.com
You are here: Home / Science News / A Kind of 'Invisibility Cloak' Perfected
DDoS Protection Powered By Verisign
Researchers Perfect a Kind of 'Invisibility Cloak' for Microwaves
Researchers Perfect a Kind of 'Invisibility Cloak' for Microwaves
By Barry Levine / NewsFactor Network Like this on Facebook Tweet this Link thison Linkedin Link this on Google Plus
PUBLISHED:
NOVEMBER
12
2012


Move over, Harry Potter. Scientists at Duke University say they have created a perfect "invisibility cloak."

Of course, this advance comes with a few catches. The cloaking is currently invisible only from one direction of viewing, and it is designed to work with microwaves, for possible uses in telecommunications or radar.

The cloak causes microwaves to flow around the object. To a perceiver, such as radar, space where the object resides appears to be empty, filled by the scene behind the object. The cloaking has worked on a cylinder that is 7.5 centimeters in diameter and 1 centimeter tall.

'Transformation Optics'

Invisibility research kicked into higher gear in 2006, following the publication of a paper by Duke researchers and Sir John Pendry of Imperial College London that presented the theory of "transformation optics." A cloak was demonstrated in 2006, but the Duke researchers described that incarnation as "very poor," largely because of reflections.

The researchers use a cloak created from artificial metamaterials that are constructed in a series of concentric circles and that interact with electromagnetic waves in ways different from natural materials. Theoretically, the metamaterials could hide an object of any size or material, at least from microwaves, but their first incarnation caused reflections that hindered the illusion.

Researchers Professor David Smith and graduate student Nathan Landy told news media that the reflections occurred at the boundaries of the cloak, not unlike reflections seen on clear glass -- a viewer can see through the glass, but is also aware of the presence of the glass because of reflections from the surface. In the first experiments six years ago, the purpose was primarily to demonstrate a proof of concept, so the reflections issue was left unresolved.

To solve this problem, they eventually tried to rework how the edges of the microwave cloak lined up, so that there would be no reflection to give away the object's position.

'Perfect Invisibility'

That original cloak was composed of parallel and intersecting strips of fiberglass etched with copper. The current cloak uses a similar row-by-row design, but copper strips have been added to create better performance and fewer reflections.

Professor Smith told BBC News that "this, to our knowledg, is the first cloak that really addresses getting the transformation exactly right to get you that perfect invisibility."

He also compared the current limitation of the technology -- being invisible only if it is seen from one direction -- to "the card people in Alice in Wonderland." The card people, Smith noted, can be nearly invisible if they turn their sides toward you, "but they're obviously visible if you look from the other direction."

The researchers have indicated that this kind of invisibility would be difficult to achieve with visible light, but, so far, they've not ruled out that possibility. In addition to potential military uses, the current microwave-targeted incarnation could also find application in fiber optics, in order to bend light efficiently around physical corners in fiber cables.

The new research has been published by Duke researchers in the Nov. 11 online issue of Nature magazine.

Tell Us What You Think
Comment:

Name:

Satewie:

Posted: 2012-11-12 @ 8:18pm PT
Sounds like they already have it for visible light. Why would a government with this technology for "microwaves only" release that information to the public, especially with the possibilities this type of technology brings.

Like Us on FacebookFollow Us on Twitter
TOP STORIES NOW
MAY BE OF INTEREST
Salesforce.com is the market and technology leader in Software-as-a-Service. Its award-winning CRM solution helps 82,400 customers worldwide manage and share business information over the Internet. Experience CRM success. Click here for a FREE 30-day trial.
MORE IN SCIENCE NEWS
Product Information and Resources for Technology You Can Use To Boost Your Business

Network Security Spotlight
Dairy Queen Latest Retailer To Report Hack
Dairy Queen is known for its hot fries and sweet treats, but it just made cyber history as the latest victim of a hack attack. The fast food chain said that customer data at some stores may be at risk.
 
Lessons from the JPMorgan Chase Cyberattack
JPMorgan Chase is investigating a likely cyberattack. The banking giant is cooperating with law enforcement, including the FBI, to understand what data hackers may have obtained.
 
Who Is the Hacker Group Lizard Squad?
Are they dangerous or just obnoxious? That’s what many are wondering about the hacker group Lizard Squad, which tweeted out a bomb threat that grounded a flight with a Sony exec aboard.
 

Enterprise Hardware Spotlight
Intel Intros Lightning-Fast PC Processors
Call it extreme. Intel just took the covers off its first-ever eight-core desktop processor, which is aimed at hardcore power users who expect more than the status quo from their computers.
 
HP Previews ProLiant Gen9 Data Center Servers
Because traditional data center and server architectures are “constraints” on businesses, HP is releasing new servers aimed at faster, simpler and more cost-effective delivery of computing services.
 
Apple Set To Release Largest iPad Ever
Tech giant Apple seems to have adopted the mantra “go big or go home.” The company is planning to introduce its largest iPad ever: a 12.9-inch behemoth that will dwarf its largest existing models.
 

Mobile Technology Spotlight
Samsung Maps Its Way with Nokia's 'Here' App for Galaxy Phones
Korean electronics giant Samsung has opted to license Here, Nokia’s mapping app -- formerly known as Nokia Maps -- for its Tizen-powered smart devices and Samsung Gear S wearable.
 
Google Successfully Tests Its Own Delivery Drone
While top technology companies are engaged in an "arms race" to develop drones that can quickly deliver goods to anyone anywhere, Google has revealed it successfully tested its own version.
 
iPhone 6 May Do NFC-Based Mobile Payments
Apple's latest version of the iPhone may have a mobile wallet to pay for purchases with a tap of the phone. The iPhone 6 reportedly is equipped with near-field communication (NFC) technology.
 

Navigation
NewsFactor Network
Home/Top News | Enterprise I.T. | Cloud Computing | Applications | Hardware | Mobile Tech | Big Data | Communications
World Wide Web | Network Security | Data Storage | CRM Systems | Microsoft/Windows | Apple/Mac | Linux/Open Source | Personal Tech
Press Releases
NewsFactor Network Enterprise I.T. Sites
NewsFactor Technology News | Enterprise Security Today | CRM Daily

NewsFactor Business and Innovation Sites
Sci-Tech Today | NewsFactor Business Report

NewsFactor Services
FreeNewsFeed | Free Newsletters

About NewsFactor Network | How To Contact Us | Article Reprints | Careers @ NewsFactor | Services for PR Pros | Top Tech Wire | How To Advertise

Privacy Policy | Terms of Service
© Copyright 2000-2014 NewsFactor Network. All rights reserved. Article rating technology by Blogowogo. Member of Accuserve Ad Network.