Anti-Laser Is A Coherent Perfect Absorber

A coherent perfect absorber has been created by Yale University researchers. The device is an anti-laser because it can absorb laser light completely.

Any dark material can absorb light — a car’s black interior on a summer day, for instance — but to absorb near 100 percent of the light of a laser beam requires a bit more precision. The difference in the anti-laser is that instead of using an amplifying material, it uses one that absorbs it — or a “loss medium.” After his research team did the math, Stone said, they decided that silicon was the best choice.

The anti-laser is set up to split a single laser beam into two and direct the two beams to head toward each other, meeting at the paper-thin silicon wafer. The light’s waves are precisely tuned to interlock with each other and become trapped. They then dissipate into heat.

Perhaps the most novel part of the device is that it allows the operator to tune the light’s wavelengths and determine how much of the laser light is absorbed. That allows the device to work as an on-off switch for light.

Physicist A. Douglas Stone led a team of applied physicists headed by Hui Cao and Wenjie Wan to create the device.

Didn't the Borg have the ability to absorb laser light at specific frequencies? Once they learned to counter a particular weapon, that weapon was never effective again. Via LA Times. Thanks to Jeff Schwenneker for the tip on this story.

Scroll down for more stories in the same category. (Story submitted 2/17/2011)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | | 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 ( 2 )

Related News Stories - (" Engineering ")

Dune Fans! Power Your Devices With Sweaty Shirts
Yet another power source from humans.

Zero Mass 'Vaporators' Pull Drinking Water From The Air
Did you think of Star Wars?

Integrated Circuits Printed Right Onto Fabric!
'...a shirt that displayed email on its sleeve. - Margaret Atwood, 2003.

Drones Guided By The Mind Alone
'His treads left no tracks upon the floor...' - Clifford Simak, 1961.



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

Save Your Brain's Connectome, Upload Yourself Elsewhere
'You've got remote storage. How regular is the update?'

TMS Decreases Belief In God, Increases Belief In Immigrants
'... setting up the same currents, the same basic ideas, in them all.'

Loomo Mini Transporter Robot Companion You Ride On
'Slowly the [robot] horse raised its head, wiggled its ears, blinked twice, gave a tentative whinny.'

Soft Robotics - Now With 3D Printed Sensors!
'A series of chemelectric afferent nerve-analogues, which permitted it to gauge to an ounce the amount of pressure necessary to snap a bone...'

AI Tool Lynx Insight And The Cybernetic Newsroom
'The structure,... was once a great homeostatic newspaper, the New York Times. It printed itself directly below us...'

Espresso Telescope Searches For Exoplanets
'These instruments were the wonderful ones our astronomers had perfected.'

Dune Fans! Metal-Organic Frameworks Make Science Fiction Real
'Dew collectors,' he muttered, enchanted by the simple beauty of such a scheme.

Manned Maneuvering Unit From 1984
'The glittering little rocket bolted to the black iron behind him.'

Astronaut Gets Younger In Space
'So what we're looking for now is not an antibiotic - an anti-life drug - but an anti-agathic, an anti-death drug...'

Blockchain Used To Verify Election Results
'Any adult could punch into the phone his or her code, followed by a yes or no.'

IJOP Integrated Joint Operations Platform China's Minority Report?
'All day long the idiots babbled, imprisoned in their special high-backed chairs...'

HushMe Bluetooth Device Reinvents The Hush-A-Phone
'Talking into a hush-a-phone which he had plugged into the telephone jack...'

Ultrathin Brain Needle Developed At MIT
Putting drugs into a selected cubic millimeter within the living brain.

Tesla Semi Truck Now At Work
Why wait? Tesla Semi now hard at work.

Illustris: The Next Generation Of Universe Simulation
'This digital device was ... A machine able literally to contain the Universe Itself...'

Scaly Yet Soft Robotic Snake
Love those robotic sneks.

More SF in the News Stories

More Beyond Technovelgy science news stories

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

Copyright© Technovelgy LLC; all rights reserved.