News tagged with light beams
New microscope uses rainbow of light to image the flow of individual blood cells
Blood tests convey vital medical information, but the sight of a needle often causes anxiety and results take time. A new device developed by a team of researchers in Israel, however, can reveal much the same ...
May 21, 2012 |
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Photonics: Beam me up
'Tractor beams' of light that pull objects towards them are no longer science fiction. Haifeng Wang at the A*STAR Data Storage Institute and co-workers have now demonstrated how a tractor beam can in fact be realized on a ...
May 24, 2012 |
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Scientists move objects across meter-scale distances using only light (w/ Video)
(PhysOrg.com) -- For more than 40 years, scientists have been using the radiation pressure of light to move and manipulate small objects in space. But until now, the movements have always been restricted to ...
Sep 30, 2010 |
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Physicists turn to Maxwell’s equations for self-bending light
(Phys.org) -- Can light self-bend into an arc? Can shape-preserving optical beams truly bend along a circular path? A confident answer emerged in this week’s Physical Review Letters. Researchers at Israel’s Techni ...
Apr 21, 2012 |
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Physicists Demonstrate Three-Color Entanglement
(PhysOrg.com) -- For the first time, physicists have demonstrated the quantum entanglement of three light beams, all of different wavelengths. Entanglement of two light beams of different wavelengths has already ...
Oct 07, 2009 |
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Physicists build highly efficient 'no-waste' laser
A team of University of California, San Diego researchers has built the smallest room-temperature nanolaser to date, as well as an even more startling device: a highly efficient, "thresholdless" laser that ...
Feb 08, 2012 |
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Scientists take fresh look at 'faster-than-light' experiment
Scientists who threw down the gauntlet to physics by reporting particles that broke the Universe's speed limit said on Friday they were revisiting their contested experiment.
Oct 28, 2011 |
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Light-Driven Nanorod Could Roll on Water
(PhysOrg.com) -- In a recent study, researchers have examined the possibility of rolling a nanorod on the surface of water. On the macroscale, perhaps the closest analogy might be the sport of logrolling, ...
Dec 18, 2009 |
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Researchers find world's first x-ray laser produces most coherent x-ray radiation ever
(PhysOrg.com) -- The world's first x-ray laser, the Linac Coherent Light Source (LCLS), first unveiled in 2009 at the Stanford Linear Accelerator Center in Palo Alto California, has been undergoing testing ...
Oct 03, 2011 |
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Scientists build world's first anti-laser
More than 50 years after the invention of the laser, scientists at Yale University have built the world's first anti-laser, in which incoming beams of light interfere with one another in such a way as to perfectly ...
Feb 17, 2011 |
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Quantum physics first: Researchers observe single photons in two-slit interferometer experiment
Quantum mechanics is famous for saying that a tree falling in a forest when there's no one there doesn't make a sound. Quantum mechanics also says that if anyone is listening, it interferes with and changes the tree. And ...
Jun 02, 2011 |
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Nanoscale nonlinear light source created
Not long after the development of the first laser in 1960 scientists discovered that shining a beam through certain crystals produced light of a different color; more specifically, it produced light of exactly ...
Sep 22, 2011 |
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Single molecule can shift the phase of a laser beam
(PhysOrg.com) -- The ability to control light forms the basis of many technologies, from microscopy to optical computing. Now, a team of scientists from ETH in Zurich, Switzerland, has demonstrated that a ...
Sep 06, 2011 |
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Flipping an egg carton of light traps giant atoms
(PhysOrg.com) -- In an egg carton of laser light, University of Michigan physicists can trap giant Rydberg atoms with up to 90 percent efficiency, an achievement that could advance quantum computing and terahertz ...
Dec 23, 2011 |
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Scientists show atoms act like lasers
(PhysOrg.com) -- Scientists from The Australian National University have developed an atom laser that behaves exactly like a light laser, opening up new possibilities in things like holograms.
Feb 25, 2011 |
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