Posts Tagged ‘photons’
Communication gets speedy switch-up
NORTHWESTERN (US) — An ultrafast quantum Internet where encrypted information is completely secure may become reality following the development of a switching device that could also succeed in networking superfast quantum computers. Continue…
Tuesday, March 15, 2011 12:09 - 0 Comments
Science & Technology - Feb 7, 2011 12:34 - 0 Comments
Uber-efficient solar cells from nano
UC DAVIS (US) — A new approach to solar power using nanoparticles aims to increase efficiency by generating several electrons from a single proton, instead of the “one in, one out” principle that conventional solar cells operate on. (more…)
Science & Technology - Jan 31, 2011 19:41 - 0 Comments
Physicists hide photons in ‘shell game’
UC SANTA BARBARA (US) — A feat that has eluded physicists for more than a decade has been achieved using a technique inspired by the slight-of-hand “shell game.” (more…)
Science & Technology - Nov 29, 2010 12:45 - 1 Comment
Entangled quantum memory x4
CALTECH (US) — Researchers have demonstrated quantum entanglement for a quantum state stored in four spatially distinct atomic memories, paving the way for quantum networks. (more…)
Science & Technology - Nov 16, 2010 11:48 - 0 Comments
Etch a Sketch on the nanoscale
U. PITTSBURGH (US) — When combined with near-atomic-size electronic circuitry, a newly developed nanoscale light sensor is able to produce hybrid optic and electronic devices. (more…)
Science & Technology - Oct 4, 2010 13:43 - 0 Comments
Silence noise to improve communication
U. SOUTHAMPTON (UK) — A new data transmission system could substantially improve the capacity and energy efficiency of the world’s optical communication networks. (more…)
Science & Technology - Oct 1, 2010 10:35 - 0 Comments
Breaking photons’ color barrier
U. OREGON (US) — A new method that changes the color of single photons in a fiber optic cable could be a quantum step forward for transferring and receiving high volumes of secured data for future generations of the Internet. (more…)
Science & Technology - Jun 14, 2010 16:53 - 0 Comments
‘Mind-bending’ crystals color butterfly wings
YALE (US)—At the very heart of some of the most brilliant colors on the wings of butterflies lie bizarre structures that may be of use in harnessing the power of light. (more…)
Science & Technology - Apr 20, 2010 15:34 - 0 Comments
Testing the waters of quantum computing
CARDIFF (UK)—Physicists have discovered properties of hybrid light-matter particles by firing photons into a tiny tower of semiconducting material. The findings have long-term implications for information and communications technology. (more…)
Science & Technology - Apr 3, 2010 11:56 - 0 Comments
Energy from noise clears up cloudy vision
PRINCETON (US)—A new technique for revealing images of hidden objects may one day allow pilots to peer through fog and doctors to see more precisely into the human body without surgery. (more…)
Science & Technology - Feb 24, 2010 12:09 - 0 Comments
Measuring matter hotter than the sun
VANDERBILT (US)—Scientists have created an exotic state of matter with a temperature of four trillion degrees Celsius. It’s the hottest temperature ever achieved in a laboratory and 250,000 times hotter than the heart of the sun. (more…)
Science & Technology - Dec 17, 2009 13:23 - 0 Comments
Scientists film photons with electrons
CALTECH (US)—Recently invented techniques—that allow the real-time, real-space visualization of fleeting changes in the structure of nanoscale matter—have been used to image the evanescent electrical fields produced by the interaction of electrons and photons, and to track changes in atomic-scale structures. (more…)
Science & Technology - Nov 16, 2009 17:14 - 0 Comments
Tiny light beam budges nanoscale object
CORNELL (US)—With a bit of leverage, researchers have used a very tiny beam of light with as little as 1 milliwatt of power to move a silicon structure up to 12 nanometers. That’s enough to completely switch the optical properties of the structure from opaque to transparent, they report. (more…)
Society & Culture - Oct 30, 2009 5:47 - 2 Comments
Race ends in dead heat; Einstein wins
STANFORD (US)—Racing across the universe for the last 7.3 billion years, two gamma-ray photons arrived at NASA’s orbiting Fermi Gamma-ray Space Telescope within nine-tenths of a second of one another. The dead-heat finish may stoke the fires of debate among physicists over Einstein’s special theory of relativity because one of the photons possessed a million times more energy than the other. (more…)
Science & Technology - Sep 17, 2009 19:27 - 7 Comments
Nanotubes may yield greener solar cells
In a carbon nanotube-based photodiode, electrons (blue) and holes (red) release their excess energy to efficiently create more electron-hole pairs when light is shined on the device. (Credit: Nathan Gabor)
Science & Technology - Jul 13, 2009 15:28 - 0 Comments
Running nanodevices on ‘repulsive’ light
Tang’s team show how interacting lightwaves can be used to control devices on a silicon chip. (Photo: Hong Tang/Yale University)
Science & Technology - Apr 29, 2009 14:10 - 1 Comment
Ultra-sensitive nanodevice ‘wired’ by light
YALE (US)—In the push to detect motion on the atomic level—like the spin of a single electron—researchers from Yale University have proposed using silicon-based nanocantilevers that are smaller than the wavelength of light. The novel approach employs photonic principles, eliminating the need for electric transducers and expensive laser setups. (more…)
Science & Technology - Mar 16, 2009 10:43 - 0 Comments
The photon force is with us—and it’s driving our nanomachines
YALE (US)—Science fiction writers have long envisioned sailing a spacecraft by the optical force of the sun’s light. But, the forces of sunlight are too weak to fill even the oversized sails that have been tried. Now a team led by researchers at the Yale School of Engineering & Applied Science has shown that the force of light indeed can be harnessed to drive machines—when the process is scaled to nano-proportions. (more…)
Science & Technology - Mar 5, 2009 12:45 - 0 Comments
Energy-efficient way to build a better laser
PRINCETON (US)—Scientists have discovered a more efficient way to produce a high-performing laser. The finding could lead to lasers that operate at higher temperatures than existing devices, making them ideally suited for applications in air quality monitoring, medical diagnostics, and even homeland security.
