Invisibility Cloaks Get Bigger

Print out big sheets of metamaterials to create real-life invisibility cloaks? A new technique developed by John Rogers, a professor of materials science and engineering at the University of Illinois at Urbana-Champaign, seems to make this possible.

Although practical invisibility cloaks are still in the future, we've been getting close. However, most cloaking devices are too small (see Invisibility Cloaks Seen As Possible With Metamaterials and Invisibility Cloak Fools Naked Eye ), or require the manipulation of spacetime (see Spacetime Cloak Of Invisibility Conceals Events ).


(Largest sheet of metamaterial ever made)

Metamaterials are made up of intricately patterned layers, often of metals. The patterns must be on the same scale as the wavelength of the light they're designed to interact with. In the case of visible and near-infrared light, this means features on the nanoscale. Researchers have been making these materials with such time-consuming methods as electron-beam lithography.

Rogers has developed a stamp-based printing method for generating large pieces of one of the most promising types of metamaterial, which can make near-infrared light bend the "wrong" way when it passes through. Materials with this so-called negative index of refraction are particularly promising for making superlenses, night-vision invisibility cloaks, and sophisticated waveguides for telecommunications.

The Illinois group starts by molding a hard plastic stamp that's covered with a raised fishnet pattern. The stamp is then placed in an evaporation chamber and coated with a sacrificial layer, followed by alternating layers of the metamaterial ingredients—silver and magnesium fluoride—to form a layered mesh on the stamp. The stamp is then placed on a sheet of glass or flexible plastic and the sacrificial layer is etched away, transferring the patterned metal to the surface. So far Rogers says he's made metamaterial sheets a few inches per side, but by using more than one stamp he expects to increase that to square feet.

As far as I know, the first reference to an invisibility cloak in science fiction is the invisible cloak from Ray Cummings 1931 classic Brigands of the Moon. Humans have been fascinated by this topic; Greek and Norse mythology have plenty of examples. The first science fiction novel about invisibility is, of course, The Invisible Man, by H.G. Wells in 1897.

Via MIT's Technology Review.

Scroll down for more stories in the same category. (Story submitted 6/11/2011)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 0 )

Related News Stories - (" Material ")

Self-Healing Material Pulls Carbon Out Of The Air
'... could seal the punctures.' - Raymond Z. Gallun, 1951.

Shapeshifting Materials Transform By Light
'Its lines wavered, flowed, and then painfully reformed.'- Philip K. Dick, 1957.

Superstrong Multilayer Metal-Graphene Composite Material
Negligible increase in weight increased material strength by hundreds of times.

Amphibio 3D Printed Gill Shirt
'... we can descend and live down there at one of those year-round aquatic resorts.' - Philip K. Dick, 1966.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

Wound Healing With Wearable Nanogenerators
'... forcing the energy transfer which allowed him to ... erase the other internal-external damage.'

Flying Dragon Robot Transforms In Mid-Air
Terrific prototype video.

Negative Matter Fluid Theorized In New Paper
'Of course, being negative matter, when you push it, it comes toward you..'

Grow Structures Upon Planetfall - Myco-Architecture
'They'll also start pulling in gases and liquids from the local atmosphere...'

MXene Hydrogel Skin For Robots Flexes And Senses
'The plastex swam and whirled like boiling toothpaste...'

EXPLORER, The First Total-Body Scanner
'The object is built up of an infinite series of plane layers, at the focus of the ray...'

UK Police AI To Stop Criminals Before They Strike
'... the computing mechanisms that studied and restructured the incoming material.'

Sonitus Audio Interface Positioned Beyond The Noise
'... an instrument having relatively small bit pieces adapted to be gripped between the teeth.'

Volvo's Self-Driving Mining Trucks
'A procession of automatic ore carts was racing over the bleak slag'

Audi Pop.Up Autonomous Electric Flying Car
'The cab was an egg-shaped bubble of light metals and plastics...'

Music Not Impossible (MNI) Vibrotactile Wearable Experience
Don't you want to experience the 'feely' effects?

Chinese Face Recognition Mistakes Bus Ad For Jaywalker
'... the imprint of her image on the telephoto cell.'

A Look Back At Apollo's Emergency Escape Vehicle
'A simple mechanism... it drove the iron ball through space like a ship.'

InMotion Glide 3 Electric Unicycle For The Last Mile
'...gyro-stabilized on a single wheel.'

China's Social Credit System - A Facebook-1984 Mashup
'Prestige, face, mana, repute, glory: the Sirenese word is strakh.'

Musk Declares Tesla Supercharger Capacity Will Double By Next Year
'Recharge the batteries... in almost every town and village...'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.