Posts Tagged ‘light’
Coating makes 3-D objects look flat
U. MICHIGAN (US) — Engineers have developed a carbon nanotube coating that can conceal an object’s 3-D geometry, absorbing 99.9 percent of its light to make it look like a flat black sheet. Continue…
Friday, December 2, 2011 10:45 - 0 Comments
Science & Technology - Nov 21, 2011 12:05 - 0 Comments
Light switched on and off with few photons
CORNELL (US) — The passage of a light beam through an optical fiber can be controlled by just a few photons of another light beam, new research demonstrates. (more…)
Science & Technology - Sep 28, 2011 11:28 - 1 Comment
Nonlinear laser light at the nanoscale
STANFORD (US) — By harnessing plasmonics to intensify light, engineers have created an ultra-compact, nanoscale light source that could ultimately find applications in data communications. (more…)
Science & Technology - Aug 5, 2011 9:17 - 1 Comment
Engineers isolate light on photonic chip
CALTECH (US) — A new technique that isolates light signals on a silicon chip solves a longstanding problem in engineering photonic chips. (more…)
Science & Technology - Jun 8, 2011 11:50 - 1 Comment
Seeing the light preps brain for vision
BROWN U. (US) — Two studies—one with mice pups and one with tadpoles—show how exposure to light early in life helps organize and refine the circuitry of vision systems. (more…)
Science & Technology - Apr 13, 2011 16:56 - 1 Comment
Slow light to capture a rainbow
U. BUFFALO (US) — Scientists have taken a step toward a breakthrough in optical communications by slowing broadband light waves using a type of material called nanoplasmonic structures. (more…)
Science & Technology - Jan 18, 2011 11:53 - 0 Comments
Camera captures range of real-world light
U. WARWICK (UK) — The world’s first complete high dynamic range (HDR) camera can capture high-quality video in a wide range of lighting conditions, including inside the human body. (more…)
Science & Technology - Dec 23, 2010 13:47 - 1 Comment
Light scattered via nanotubes
CORNELL (US) — Just as walkie-talkies transmit and receive radio waves, carbon nanotubes can transmit and receive light at the nanoscale. (more…)
Science & Technology - Aug 3, 2010 0:34 - 4 Comments
Membrane gets permeable in purple light
U. ROCHESTER (US)—A newly developed membrane blocks gas from flowing through it when one color of light is shined on its surface, and permits gas to flow through when another color of light is used. (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 - Mar 17, 2010 14:04 - 0 Comments
Light gets twisted with nanoparticles
U. MICHIGAN (US)—Engineers have demonstrated that light itself can twist ribbons of nanoparticles. The details are reported in the current edition of Science. (more…)
Science & Technology - Mar 16, 2010 11:36 - 6 Comments
Universe’s age: 13.75 billion years
STANFORD (US)—Using entire galaxies as lenses to look at other galaxies, researchers have a newly precise way to measure the size and age of the universe and how rapidly it is expanding, on a par with other techniques. (more…)
Science & Technology - Mar 10, 2010 18:15 - 0 Comments
How retina’s hardware processes color
NYU (US)—Biologists have identified, in greater detail, how the retina’s cellular hardware is used in color preference. The work enhances our understanding of how eyes and the brain process color. (more…)
Science & Technology - Feb 9, 2010 17:10 - 0 Comments
“Cell listeners” shine light on nanoscale function
U. ILLINOIS (US)—One way to understand biological structures and mechanisms, according to researcher Gabriel Popescu, is to “listen to them” through the use of new optical imaging methods that measure cellular motion at the nanoscale. (more…)
Science & Technology - Feb 2, 2010 23:43 - 15 Comments
Safe travel: Sending messages by light
PENN STATE (US)—Light is better than radio waves when it comes to some wireless communications, reports a team of engineers. (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 - Sep 15, 2009 1:00 - 3 Comments
From space, signs of a brighter economy
Increased nighttime lighting indicates economic growth in Poland and Eastern Europe between 1992 (above) and 2002 (below). Poland is in the top left quarter of each image. (Credit: NOAA and USAF Weather Agency)
Science & Technology - Sep 2, 2009 14:59 - 0 Comments
Honey, who shrunk the laser light?
A bright point of light from a single plasmon laser emanates from the optical setup used by UC Berkeley researchers. (Courtesy: Xiang Zhang Lab/UC Berkeley)
Health & Medicine - Aug 20, 2009 4:00 - 0 Comments
Light’s a total turnoff for protein
A photoactivatable protein enables control of cell movement in living cells. Activation of Rac in the red circle (left) led to localized cell protrusion and translocation of the kinase PAK to the cell edge (right hand image, Pak in red). (Credit: Yi Wu)
