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Latest Photon Stories

2010-11-12 01:42:09

Controlling the flow of light with a novel optical transistor Controlling and modulating the flow of light is essential in today's telecommunications-based society. Professor Tobias Kippenberg and his team in EPFL's Laboratory of Photonics and Quantum Measurements have discovered a novel way to couple light and vibrations. Using this discovery, they built a device in which a beam of light traveling through an optical microresonator could be controlled by a second, stronger light beam. The...

2010-11-07 00:16:38

A new analysis technique for the design and optimization of beam optics has successfully been used to model the group behavior of electron beams over a linear accelerator, paving the way for its use at linear accelerator based light source facilities around the world. Tokyo, Japan (PRWeb UK) November 5, 2010 A new analysis technique for the design and optimization of beam optics has successfully been used to model the group behavior of electron beams over a linear accelerator, paving the...

2010-10-20 00:49:48

Critical component of quantum communication device may enable cryptography When the military needs to send the key to encrypted data across the world, it can't necessarily rely on today's communication lines, where the message could be covertly intercepted. But physicists at the Georgia Institute of Technology in Atlanta are developing a new, more secure way to send such information across far distances, using existing cables and the laws of quantum mechanics. Alex Kuzmich and colleagues have...

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2010-09-27 07:26:45

Using optically dense, ultra-cold clouds of rubidium atoms, researchers have made advances in three key elements needed for quantum information systems "“ including a technique for converting photons carrying quantum data to wavelengths that can be transmitted long distances on optical fiber telecom networks. The developments move quantum information networks "“ which securely encode information by entangling photons and atoms "“ closer to a possible prototype system....

2010-09-21 22:03:03

Ever since audiences heard Goldfinger utter the famous line, "No, Mr. Bond; I expect you to die," as a laser beam inched its way toward James Bond and threatened to cut him in half, lasers have been thought of as white-hot beams of intensely focused energy capable of burning through anything in their path. Now a team of Yale physicists has used lasers for a completely different purpose, employing them to cool molecules down to temperatures near what's known as absolute zero, about -460...

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2010-09-17 12:58:46

An international research group led by scientists from the University of Bristol has developed a new approach to quantum computing that could soon be used to perform complex calculations that cannot be done by today's computers. Scientists from Bristol's Centre for Quantum Photonics have developed a silicon chip that could be used to perform complex calculations and simulations using quantum particles in the near future. The researchers believe that their device represents a new route to a...

2010-09-10 04:35:02

Tokyo, Sept 10, 2010 - (JCN Newswire) - Institute for Nano Quantum Information Electronics, The University of Tokyo (Director: Yasuhiko Arakawa), Fujitsu Laboratories Limited, and NEC Corporation today announced that they have achieved quantum cryptographic key distribution(1) at a world-record distance of 50 km using transmission from a single-photon emitter(2). This result was the product of the three-way collaboration between the University of Tokyo, Fujitsu, and NEC, and represents a...

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2010-09-09 10:56:05

A simple device measures the quantum noise of vacuum fluctuations and generates true random numbers Behind every coincidence lies a plan - in the world of classical physics, at least. In principle, every event, including the fall of dice or the outcome of a game of roulette, can be explained in mathematical terms. Researchers at the Max Planck Institute for the Physics of Light in Erlangen have constructed a device that works on the principle of true randomness. With the help of quantum...

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2010-09-01 20:44:47

Researchers at the National Institute of Standards and Technology (NIST) have created "quantum cats" made of photons (particles of light), boosting prospects for manipulating light in new ways to enhance precision measurements as well as computing and communications based on quantum physics.The NIST experiments, described in a forthcoming paper, repeatedly produced light pulses that each possessed two exactly opposite properties"”specifically, opposite phases, as if the peaks of the...

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2010-08-25 19:28:25

Researchers from North Carolina State University have developed extremely small microneedles that can be used to deliver medically-relevant nanoscale dyes called quantum dots into skin "“ an advance that opens the door to new techniques for diagnosing and treating a variety of medical conditions, including skin cancer."We were able to fabricate hollow, plastic microneedles using a laser-based rapid-prototyping approach," says Dr. Roger Narayan, one of the lead researchers, "and found...


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
maffling
  • To stammer.
  • Present participle of maffle, to stammer.
  • A simpleton.
The word 'maffle' may come from a Dutch word meaning 'to move the jaws' or a French word meaning 'having large cheeks'.