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Research & Technology News
Full-Spectrum Solar Cell Created
TORONTO, June 28, 2011 — The first efficient tandem solar cell based on colloidal quantum dots (CQD) was reported at the University of Toronto, which said it may pave the way to inexpensive coatings that convert the sun's rays to electricity.
HD Tech Could Get Big Boost from Little Shrimp
PHILADELPHIA, June 28, 2011 — A two-part man-made waveplate inspired by the eye of the peacock mantis shrimp could improve CD, DVD, Blu-ray and holographic technology, creating even higher definition and larger storage density.
Lasers Generate Pure Microwave Signals
GAITHERSBURG, Md., June 28, 2011 — A new low-noise oscillator is generating microwave signals more pure and stable than those from conventional electronic sources. The apparatus could improve signal stability and resolution in radar, communications and navigation systems, and in...
New Method Images Molecules Inside Cells
GOTHENBURG, Sweden, June 28, 2011 — Using a novel sample holder, researchers at the University of Gothenburg have further developed a new method for imaging individual cells. This makes it possible to produce snapshots that show not only the outline of a cell but also the various...
Birds See More Colors Than They Wear
NEW HAVEN, Conn., June 27, 2011 — The brilliant colors of birds have inspired poets and nature lovers, but researchers at Yale University and the University of Cambridge in the UK say that these existing hues represent only a fraction of what birds can actually see. Findings...
Graphene Photodetectors Boost Data Speed
VIENNA, Austria, June 27, 2011 — Scientists at Vienna University of Technology (TU Vienna) have developed light detectors composed of graphene, demonstrating how remarkably fast the material converts light pulses into electrical signals, a capability that could considerably improve...
Wildfire Threatens Los Alamos National Lab
LOS ALAMOS, N.M., June 27, 2011 — A wind-driven wildfire is threatening Los Alamos National Laboratory, home to the Trident laser, the Roadrunner supercomputer and many National Nuclear Security Administration weapons programs.
Inspired Chaos in a Microlaser
WÜRZBURG, Germany, June 24, 2011 — Using a mirror to continually send a fraction of the emitted light back into a quantum dot microlaser, researchers were able to throw the light emission process off-kilter, prompting the microlaser to emit photons in a chaotic pulse sequence. This...
A Better Solar-Powered Water Splitter Devised
STANFORD, Calif., June 23, 2011 — To withstand the highly corrosive environment inherent in the process of splitting water, electron-producing silicon-based solar electrodes, which deteriorate almost immediately when exposed to oxygen, are now being coated with an ultrathin layer of...
Optical Amplifier Breaks Low-Noise Record
GOTHENBURG, Sweden, June 23, 2011 — An optical amplifier that can amplify light with extremely low noise has been demonstrated at Chalmers University of Technology. The new amplifier enables a reach increase for optical fiber signals from, for example, 1000 to 4000 km. This could lead...
Voyager 1 Nears the Final Frontier
LAUREL, Md., June 23, 2011 — By the time 2012 comes to a close, NASA’s Voyager 1 spacecraft may finally reach humanity’s last frontier: interstellar space. Cruising through space some 10.8 billion miles from the sun, Voyager 1 has crossed into an area where...
Black Hole Devours Star, Blasts Light Beam at Earth
COVENTRY, England, June 22, 2011 — The flash from one of the biggest and brightest bangs yet recorded originated with a massive black hole at the center of a distant galaxy that appears to have ripped apart a star that wandered too close. Some 3.8 billion years later, astronomers at...
Compact Microspectrometer Achieves High Resolution, Wide Bandwidth
ATLANTA, June 22, 2011 — A new microspectrometer architecture that uses compact disk-shaped resonators could address the challenges of integrated lab-on-chip sensing systems that now require a large off-chip spectrometer to achieve high resolution. Spectrometers have...
Smaller, Flexible LED Created
CORAL GABLES, Fla., June 22, 2011 — A new LED device has been created that uses an array of LEDs 100 times smaller than conventional LEDs and that is flexible, maintains lower temperature and has an increased life span. "The new model uses a silicon substrate, novel etching...
3-D Plasmon Rulers Created
BERKELEY, Calif., June 20, 2011 — Newly developed three-dimensional plasmon rulers capable of measuring nanometer-scale spatial changes in macromolecular systems could provide scientists with unprecedented details on critical dynamic events in biology. The spatial freedom afforded...
First Micropillars Milled in Warsaw
WARSAW, Poland, June 20, 2011 — Rare milling equipment that produces nanosize semiconductor structures, or micropillars, is now at the disposal of scientists and students at the University of Warsaw. These micropillars can be used as efficient light sources and will open up...
Laser Induces Conduction in Graphene
COLLEGE PARK, Md., June 20, 2011 — By illuminating graphene with a mid-infrared laser, researchers now can open an observable bandgap in the otherwise gapless material, enabling it to become a semiconductor. Graphene is the thinnest and strongest material ever discovered. It is...
Webb Telescope Completes First Round of Mirror Tests
GREENBELT, Md., June 20, 2011 — The first six of 18 segments that will form the James Webb Space Telescope’s primary mirror has undergone final cryogenic testing. The 10-week series included two test cycles where the mirrors were chilled down to -379 °F, then back...
Power to the Polaritons: Light-Matter Coupling Strengthened
PHILADELPHIA, June 17, 2011 — The field of photonics could see a promising advance, thanks to new engineering research that couples the strength of polaritons when confined to nanoscale semiconductors. This could lead to smaller and faster circuits that use light rather than...
Broadband Graphene Polarizer Invented
PASIR PANJANG, Singapore, June 16, 2011 — A graphene-based polarizer that can broaden the bandwidth of prevailing optical fiber-based telecommunications systems has been invented by researchers at National University of Singapore (NUS). The team, led by professor Kian Ping Loh,...
Oh, Snap: Stressed Sensor Self-Heals
RALEIGH, N.C., June 16, 2011 — One flaw of strain sensors in that they can break under stress. But a new fiber optic strain sensor can heal itself — so in the wake of earthquakes, explosions or other catastrophic events it continues collecting data, helping engineers make...
Students in Spain Build Solar Plane
CATALONIA, Spain, June 16, 2011 — A prototype for a solar energy plane called the “Solar Endeavour” is being developed by students at the Terrassa School of Industrial and Aeronautical Engineering (ETSEIAT) at the Technical University of Catalonia (UPC); their hope is to...
University of Brighton Senior ‘Blazes’ Bike Trail
EAST SUSSEX, England, June 16, 2011 — A laser image of a bicycle can now be projected onto the road ahead of bicyclists to alert oncoming traffic of their presence. "I wanted to tackle the issue of safety of cyclists on city streets by increasing the visibility, footprint and,...
Pulsed Light Reduces Allergens in Peanuts
GAINESVILLE, Fla., June 15, 2011 — Pulsed UV light can reduce the allergenic potential of peanuts by up to 90 percent, a discovery that may help make food safer for people with nut allergies. The concentrated bursts of light, known as PUV, changes peanut allergens so that human...
Telecom-Wavelength QD Laser Grown on Si
LONDON, June 15, 2011 — An electrically driven quantum dot laser grown directly on a silicon substrate with a wavelength suitable for use in telecommunications has been demonstrated, bringing a new generation of high-speed, silicon-based information technology one step...
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