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photons News
Nanotowers Fire Off Photons
WÜRZBURG, Germany, Dec. 1, 2009 – Nanotowers made of semiconducting material 'fire off' single photons in a targeted fashion, an ability needed for secure data transmission through quantum cryptography, said researchers at the University of Würzburg.
Quantum Signatures of Chaos
TUCSON, Ariz., Oct. 9, 2009 – No one has produced experimental evidence that chaos occurs in the quantum world – the world of photons, atoms, molecules and their building blocks – until now. In a series of experiments, professor Poul Jessen and a group at the University of...
Dark Matter Detector Devised
HUESCA, Spain, Sept. 30, 2009 -- A scintillating bolometer containing a crystal comprised of bismuth, germinate and oxygen (BGO) has been developed to detect the dark matter of the universe. Researchers from the University of Zaragoza in Spain and France's Institut d'Astrophysique...
Storing Sunlight for Soldiers
WRIGHT-PATTERSON AIR FORCE BASE, Ohio, & ARLINGTON, Va., July 21, 2009 -- New technologies for capturing sunlight and storing it as energy in flexible and wearable solar cells are being pursued by the Air Force Research Laboratory to help soldiers on the ground and those operating unmanned aerial vehicles.
Pixel-like Light Sensors
TORONTO, ON, June 19, 2009 – Light sensors that act like pixels in a digital camera were created at the University of Toronto. The sensors benefit from a phenomenon known as multi-exciton generation (MEG). Until now, no group had collected an electrical current from a device...
Light Powers DNA Nanomotor
GAINESVILLE, Fla., June 11, 2009 — A new mechanism created by chemists transforms light into motion, albeit at an extremely small scale. The team from the University of Florida built a new type of "molecular nanomotor" driven only by photons, or particles of light. While it is...
Light's Might Harnessed
PASADENA, Calif., June 5, 2009 – A nanoscale device created at the California Institute of Technology exploits the mechanical properties of light to create an optomechanical cavity in which interactions between light and motion are greatly strengthened and enhanced. It harnesses...
Window Generates Electricity
BURTONSVILLE, Md., May 21, 2009 – A tinted see-through coating has been developed that can generate electricity on glass windows from natural and artificial light via ultrasmall organic solar cells.
Detecting Entangled Photons
PASADENA, Calif., May 13, 2009 – Entanglement, in the form of beams of light simultaneously propagating along four distinct paths, can be detected with a surprisingly small number of measurements, according to scientists at Caltech. The group has developed a method to detect...
Imaging at 6 million fps
LOS ANGELES, May 1, 2009 – Engineers at UCLA have developed a (video) camera that captures images in real time at 6 million fps, or 1000 times faster than its predecessors. It may be used for flow cytometry to diagnose cancer.
Quantum communication, without – and with – delay
GAITHERSBURG, Md. – When it comes to computing, some of the lessons we learned in kindergarten really do apply. Algorithms have to take turns. Otherwise, final calculations could be wrong. Such data flow control is done routinely in standard computers. Now the...
Nanocrystals Improve PV Cells
LOS ALAMOS, NM, Feb. 12, 2009 – It is now possible for solar cells to create more than one unit of energy per photon, increasing the energy output of solar cells. According to a team of Los Alamos National Laboratory researchers, led by Victor Klimov, this phenomenon of carrier...
Device Filters Photons
BRISTOL, UK, Jan. 23, 2009 – Quantum technologies just got a boost from a recent demonstration of an optical device that filters two particles of light (photons) based on the correlations between their polarization that are allowed only in the quantum world. This...
The Polarization of Light by Reflection
Dec 11, 2008 — While the majority of the western world uses polarization-based advances in technology on a daily basis few realize that, were it not for the polarizability of light, these technologies would not be possible.
A Quantum Memory Boost
ATLANTA, Ga., Dec. 9, 2008 – Physicists have taken a significant step toward creation of quantum networks by establishing a new record for the length of time that quantum information can be stored in and retrieved from an ensemble of very cold atoms. Though the information...
Lasers Tune Quantum Dots
GAITHERSBURG, Md., Aug. 20, 2008 – In what could be a key development in cryptography applications, researchers from the National Institute of Standards and Technology (NIST) and the Joint Quantum Institute (JQI), a collaborative center of the University of Maryland and NIST, have...
Subsurfaces Seen Sharply
LAUSANNE, Switzerland, July 21, 2008 -- The high penetration power of x-rays has been combined with diffraction imaging to create a novel x-ray microscope that makes it possible, for the first time, to view the detailed interiors of semiconductor devices and cellular structures. The...
Unique Cavity Demonstrates Highest Optomechanical Coupling
May 1, 2008 — Photons are nearly ideal for investigating quantum phenomena: They are easy to generate and have well-defined states and straightforward interactions with matter. Quantum phenomena in macroscopic mechanical systems, on the contrary, are difficult to...
Photons on Demand
MELBOURNE, Australia, March 18, 2008 -- A device uses the unique properties of diamonds to produce single photons on demand at room temperature. Quantum Communications Victoria (QCV), part of the University of Melbourne's physics department, has developed the single-photon source, which...
Tissue Made Transparent
PASADENA, Calif., Feb. 13, 2008 -- A new optical trick that counteracts the scattering of light through humans could one day make biological tissue as see-through as a jellyfish under diagnostic and therapeutic imagers. "The reason a person is not transparent is that their tissues...
Q: What Did the Scientist Say to the LED? A: Don’t Be Square
Feb 1, 2008 — A major issue with gallium-nitride LEDs is that, although they efficiently generate short-wavelength photons, the high refractive index of GaN (n = 2.5) traps much of the light inside the semiconductor chip as a result of total internal reflection....
Fano Effect Seen Using Quantum Dot
MUNICH, Germany, Jan. 17, 2008 -- An international team of researchers has revealed a previously unseen phenomenon known as the Fano effect by using an artificial nanostructure -- a quantum dot (QD) -- instead of an atom. The work could allow the exploration of new frontiers in...
Choosing the Right Polymer Aids Direct-Write Multiphoton Photolithography
Jan 1, 2008 — Fabricating nanoscale polymer thin-film structures mightbecome easier, thanks to researchers from Kansas State University in Manhattan. Such structures could be used in chemical and biological sensor arrays, as optical elements, for electronic...
Photons, Phonons Swap Data
DURHAM, N.C., Dec. 14, 2007 -- The discovery of a way to transfer encoded information from a laser beam to sound waves and then back to light waves again is being seen as a step toward designing tomorrow's superfast optical communications networks. Swapping data between media...
Light Manipulation Improved
BATH, England, Nov. 16, 2007 -- A special hollow-core photonic crystal fiber has been used to manipulate light a million times more efficiently than ever before. The research by a team at the University of Bath, England, led by Fetah Benabid said the work has opened the door...
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May 2024
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