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Latest Photon Stories

2009-10-08 09:26:21

Chaotic behavior is the rule, not the exception, in the world we experience through our senses, the world governed by the laws of classical physics. Even tiny, easily overlooked events can completely change the behavior of a complex system, to the point where there is no apparent order to most natural systems we deal with in everyday life. The weather is one familiar case, but other well-studied examples can be found in chemical reactions, population dynamics, neural networks and even the...

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2009-09-30 08:00:03

First clients include NASA, University of Sao Paulo, European-Canadian consortium A team of Universit© de Montr©al researchers, led by physics PhD student Olivier Daigle, has developed the world's most sensitive astronomical camera. Marketed by Photon etc., a young Quebec firm, the camera will be used by the Mont-M©gantic Observatory and NASA, which purchased the first unit. The camera is made up of a CCD controller for counting photons; a digital imagery device that amplifies...

2009-09-30 07:51:38

University of Michigan physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing "designer dots" that can be tailored for specific applications. Quantum dots"”often called artificial atoms or nanoparticles"”are tiny semiconductor crystals with wide-ranging potential applications in computing, photovoltaic cells, light-emitting devices and other technologies. Each dot is a well-ordered cluster of atoms, 10 to 50 atoms in...

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2009-09-28 06:55:00

Physicists at UC San Diego have successfully created speedy integrated circuits with particles called "excitons" that operate at commercially cold temperatures, bringing the possibility of a new type of extremely fast computer based on excitons closer to reality. Their discovery, detailed this week in the advance online issue of the journal Nature Photonics, follows the team's demonstration last summer of an integrated circuit"”an assembly of transistors that is the building block for...

2009-09-09 09:57:35

The speed of light, 300 million meters per second, was long thought an immutable constant and has defined our understanding of matter and energy but recent research in the area of optics and photonics is proving that we can manipulate light to some ingenious and hugely lucrative ends. From the use of adaptive optics to catch perfect images of distant galaxies or detailed representations inside bio-specimens of, for example, mouse embryos, to electromagnetically induced transparency which can...

2009-09-08 13:16:25

Researchers at Ben-Gurion University of the Negev have developed thin films that exhibit carrier multiplication (CM). This development is of great interest for future solar cells. The films were synthesized at BGU by Prof. Yuval Golan and PhD student Anna Osherov of the Department of Materials Engineering and the Ilse Katz Institute for Nanoscale Science and Technology. The letter was published this week in Nature Physics. One of the important factors limiting solar-cell efficiency is that...

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2009-09-04 10:45:00

A new silicon chip the size of a penny uses photons to run Shor's algorithm - a well-known quantum approach - to solve mathematic problems, BBC News reported. Before the development, the algorithm required laboratory-sized optical computers to compute the two numbers that multiply together to form a given figure. Researchers say such factoring is the basis for a wide variety of encryption schemes and the new chip could easily be scaled up to handle more complex computing. Quantum computing...

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2009-08-26 13:40:00

In what may prove to be a major development for scientists in fields ranging from forensics to quantum communications, researchers at the National Institute of Standards and Technology (NIST) have developed a new, highly sensitive, low-cost technique for measuring light in the near-infrared range. The technique can measure the spectrum of the specific wavelengths of near infrared light used widely in telecommunications as well as the very weak infrared light at single-photon levels given off...

2009-08-17 09:18:31

Because the new device, called a "spaser," is the first of its kind to emit visible light, it represents a critical component for possible future technologies based on "nanophotonic" circuitry, said Vladimir Shalaev, the Robert and Anne Burnett Professor of Electrical and Computer Engineering at Purdue University.Such circuits will require a laser-light source, but current lasers can't be made small enough to integrate them into electronic chips. Now researchers have overcome this obstacle,...

2009-08-10 07:20:00

RANCHO SANTA MARGARITA, Calif., Aug. 10 /PRNewswire/ -- Most of human history has witnessed people living and working outdoors during the light of day, absorbing "life-charging" full-spectrum solar energy from the sky. An average of 10 hours daily in the sunlight, 70 hours weekly, was common for eons. Now, however, in less than a mere two hundred years, millions of people have unwittingly become "contemporary cave-dwellers," living and working indoors, sometimes, all day long. In...


Latest Photon Reference Libraries

6_c9b95f985acbe749f13bf6301a3180a85
2004-10-19 04:45:41

Electromagnetic Spectrum -- The electromagnetic spectrum describes the various types of electromagnetic radiation based on their wavelengths. Radio, representing wavelengths from a few feet to well over a mile, is at one end of the spectrum. Gamma ray radiation is at the other end: the wavelength of the harder types is so short, in the subatomic range, that we do not have instruments capable of directly measuring it. While the above classification scheme is generally accurate, in...

6_c9b95f985acbe749f13bf6301a3180a84
2004-10-19 04:45:41

Electromagnetic Radiation -- Electromagnetic radiation is a combination of oscillating electric and magnetic fields propagating through space and carrying energy from one place to another. Light is a form of electromagnetic radiation. The theoretical study of electromagnetic radiation is called electrodynamics, a subfield of electromagnetism. When any wire (or other conducting object such as an antenna) conducts alternating current, electromagnetic radiation is propagated at the same...

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Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.