Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




NANO TECH
King's College London finds rainbows on nanoscale
by Staff Writers
London, UK (SPX) Nov 23, 2012


Researchers at King's College London discovered how to separate colors and create "rainbows" using nanoscale structures on a metal surface. This may lead to improved solar cells, TV screens and photo detectors.Credit: Dr. Jean-Sebastien Bouillard, Dr. Ryan McCarron.

New research at King's College London may lead to improved solar cells and LED-displays. Researchers from the Biophysics and Nanotechnology Group at King's, led by Professor Anatoly Zayats in the department of Physics have demonstrated in detail how to separate colours and create 'rainbows' using nanoscale structures on a metal surface. The research is published in Nature's Scientific Reports.

More than 150 years ago, the discovery at King's of how to separate and project different colours, paved the way for modern colour televisions and displays. The major challenge for scientists in this discipline nowadays is the manipulation of colour at the nanoscale.

This capability will have important implications for imaging and spectroscopy, sensing of chemical and biological agents and may lead to improved solar cells, flat-screen tv's and displays.

Researchers at King's were able to trap light of different colours at different positions of a nanostructured area, using especially designed nanostructures.

Depending on the geometry of the nanostructure, a trapped rainbow could be created on a gold film that has the dimension on the order of a few micrometers - about 100 times smaller than the width of a human hair.

Professor Zayats explained: 'Nanostructures of various kinds are being considered for solar cell applications to boost light absorption efficiency.

"Our results mean that we do not need to keep solar cells illuminated at a fixed angle without compromising the efficiency of light coupling in a wide range of wavelengths. When used in reverse for screens and displays, this will lead to wider viewing angles for all possible colours.'

The big difference to natural rainbows - where red always appears on the outer side and blue on the inner side - is that in the created nanostructures the researchers were able to control where the rainbow colours would appear by controlling the nanostructures' parameters.

On top of this, they discovered that it is possible to separate colours on different sides of the nanostructures.

Co-author Dr Jean-Sebastien Bouillard from King's said: 'The effects demonstrated here will be important to provide 'colour' sensitivity in infrared imaging systems for security and product control. It will also enable the construction of microscale spectrometers for sensing applications.'

The ability to couple light to nanostructures with multicolour characteristics will be of major importance for light capturing devices in a huge range of applications, from light sources, displays, photo detectors and solar cells to sensing and light manipulation in optical circuits for tele- and data communications.

Paper title: 'Broadband and broadangle SPP antennas based on plasmonic crystals with linear chirp'.

.


Related Links
King's College London
Nano Technology News From SpaceMart.com
Computer Chip Architecture, Technology and Manufacture






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





NANO TECH
Controlling heat flow through a nanostructure
Cambridge, MA (SPX) Nov 23, 2012
Thermoelectric devices, which can harness temperature differences to produce electricity, might be made more efficient thanks to new research on heat propagation through structures called superlattices. The new findings show, unexpectedly, that heat can travel like waves, rather than particles, through these nanostructures: materials made up of layers only a few billionths of a meter in thicknes ... read more


NANO TECH
China's Chang'e-3 to land on moon next year

Moon crater yields impact clues

Study: Moon basin formed by giant impact

NASA's LADEE Spacecraft Gets Final Science Instrument Installed

NANO TECH
Spacecraft Monitoring Martian Dust Storm

Meteorite samples provide definitive evidence of water and rock types on Mars

Curiosity Rover Preparing for Thanksgiving Activities

Curiosity Team May Reveal Major Discovery Soon

NANO TECH
UK Secures Billion Pound Package For Space Investment

Europe, U.S. talk space program link

At Helsinki's Slush, start-ups 'speed date' for financing

NASA Selects Information Technology Flight Operations Support Contract

NANO TECH
Mr Xi in Space

China plans manned space launch in 2013: state media

China to launch manned spacecraft

Tiangong 1 Parked And Waiting As Shenzhou 10 Mission Prep Continues

NANO TECH
Three ISS crew return to Earth in Russian capsule

Station Crew Off Duty After Undocking

Space station command changes

Russia restores space contact after cable rupture

NANO TECH
Pleiades 1B is ready for integration in the payload "stack" for Arianespace's next Soyuz mission

France, Germany compromise on Ariane launcher: minister

Mexsat Bicentenario is delivered to French Guiana for its December launch on Ariane 5

France, Germany seek Ariane compromise at ESA space meet

NANO TECH
Rare image of Super-Jupiter sheds light on planet formation

Astronomers Directly Image Massive Star's 'Super-Jupiter'

NASA's Kepler Wraps Prime Mission, Begins Extension

Lowell astronomer, collaborators point the way for exoplanet search

NANO TECH
Systems engineering expertise leads to increased counterfire target acquisition radar capabilities

Raytheon achieves critical firsts for US Navy dual-band radar

Thermogenerator from the Printer

University of Glasgow and Clyde Space set to put brakes on space junk problem




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement