Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. Space Industry and Business News .




CHIP TECH
Quantum kisses change the color of nothing
by Staff Writers
Cambridge UK (SPX) Nov 08, 2012


File image.

Even empty gaps have a colour. Now scientists have shown that quantum jumps of electrons can change the colour of gaps between nano-sized balls of gold. The new results, published in the journal Nature, set a fundamental quantum limit on how tightly light can be trapped.

The team from the Universities of Cambridge, the Basque Country and Paris have combined tour de force experiments with advanced theories to show how light interacts with matter at nanometre sizes. The work shows how they can literally see quantum mechanics in action in air at room temperature.

Because electrons in a metal move easily, shining light onto a tiny crack pushes electric charges onto and off each crack face in turn, at optical frequencies. The oscillating charge across the gap produces a 'plasmonic' colour for the ghostly region in-between, but only when the gap is small enough.

Team leader Professor Jeremy Baumberg from the University of Cambridge Cavendish Laboratory suggests we think of this like the tension building between a flirtatious couple staring into each other's eyes. As their faces get closer the tension mounts, and only a kiss discharges this energy.

In the new experiments, the gap is shrunk below 1nm (1 billionth of a metre) which strongly reddens the gap colour as the charge builds up. However because electrons can jump across the gap by quantum tunnelling, the charge can drain away when the gap is below 0.35nm, seen as a blue-shifting of the colour. As Baumberg says, "It is as if you can kiss without quite touching lips."

Matt Hawkeye, from the experimental team at Cambridge, said: "Lining up the two nano-balls of gold is like closing your eyes and touching together two needles strapped to the end of your fingers. It has taken years of practise to get good at it."

Prof Javier Aizpurua, leader of the theoretical team from San Sebastian complains: "Trying to model so many electrons oscillating inside the gold just cannot be done with existing theories." He has had to fuse classical and quantum views of the world to even predict the colour shifts seen in experiment.

The new insights from this work suggest ways to measure the world down to the scale of single atoms and molecules, and strategies to make useful tiny devices.

.


Related Links
University of Cambridge
Computer Chip Architecture, Technology and Manufacture
Nano Technology News From SpaceMart.com






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





CHIP TECH
Ultrasensitive photon hunter
Munich, Germany (SPX) Nov 08, 2012
When it comes to imaging, every single photon counts if there is barely any available light. This is the point where the latest technologies often reach their limits. Researchers have now developed a diode that can read photons faster than ever before. Fast and ultrasensitive optical systems are gaining increasing significance and are being used in a diverse range of applications, for exam ... read more


CHIP TECH
Sensors for the real world

Soluble circuit boards to reduce e-waste

Megaupload boss aims to lie low

How Butterfly Wings Can Inspire New High-Tech Surfaces

CHIP TECH
Raytheon BBN Technologies' WNaN next generation network software selected for NIE 13.1 experiment

Raytheon announces Small Format Guard to secure data transfer for mobile and tactical forces

Pentagon to end exclusive deal with RIM's Blackberry

Space Systems Loral Selected by USAF to Develop Next Gen Protected Military Satellite Communications

CHIP TECH
Russian Proton Briz-M Launches Yamal Satellites Into Orbit

SpaceX Transitions to Third Commercial Crew Phase with NASA

Globalstar Birds To Launch On Soyuz Next February

Ariane 5s are readied in parallel for Arianespace's next heavy-lift flights

CHIP TECH
Gazprom to Launch Two Satellites by Yearend

Research cruise testing EGNOS satnav for ships

Two SOPS accepts command and control of newest GPS satellite

Telit Introduces LTE Module Expanding Automotive Product Line with 4G for North American and European Markets

CHIP TECH
Hundreds of flights canceled in New York storm

Australia's Chief of Air Force Visits Northrop Grumman's F-35 Production Facility in Palmdale

Boeing Delivers Fifth Production P-8A Poseidon Aircraft to US Navy

Boeing's Indian deal may take six months: officials

CHIP TECH
Quantum kisses change the color of nothing

Ultrasensitive photon hunter

Northrop Grumman Begins Sampling New Gallium Nitride MMIC Product Line

Japan's electronics sector in race against time

CHIP TECH
NASA's SPoRT Team Tracks Hurricane Sandy

Sizing up biomass from space

NASA Radar Penetrates Thick, Thin of Gulf Oil Spill

Satellite images tell tales of changing biodiversity

CHIP TECH
Smog in Indian capital blamed on vehicle increase

USDA Patents Method to Reduce Ammonia Emissions

EU Council adopts marine fuel sulfur cuts

More than 50 detained in China pollution protests




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