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light waves News
Nonlinear Near-Field Optical Microscopy Images Evanescent Waves in Real Time
HAIFA, Israel, April 19, 2021 — Researchers from Technion-Israel Institute of Technology demonstrated an approach for obtaining images of evanescent waves that uses nonlinear wave-mixing. The microscopy method allowed the researchers to fully reconstruct the electromagnetic field of the evanescent waves and to perform real-time monitoring of wave-pattern changes. Nonlinear wave-mixing combines two or more light beams, including one that is very intense, to generate a new electromagnetic wave of a different color; the
Microwaveguides Could Speed Control of Light Flux in PICs
NIZHNY NOVGOROD, Russia, Jan. 2, 2019 — In order to increase the speed with which photonic integrated circuits (PICs) control light flux, researchers are for new materials with high optical nonlinearity. Among the promising materials are microwaveguides based on graphene, a material in...
Uncharted Waters
ROCHESTER, N.Y., Oct. 4, 2017 — As the saying goes, "difficult is done at once; the impossible takes a little longer." It took Xi-Cheng Zhang, an optics professor at the University of Rochester, nearly a decade to generate a terahertz wave from water — an achievement that...
Glass nanofibers used to detect atoms
VIENNA – A highly sensitive method that requires specially prepared light waves coupled to ultrathin glass fibers can be used to count and interact with a very small number of atoms, making extremely sensitive detectors possible. The glass nanofibers...
Method Uses Glass Fiber to Detect Atoms
VIENNA, Dec. 9, 2011 — A highly sensitive method that requires specially prepared light waves coupled to ultrathin glass fibers can be used to count and interact with a very small number of atoms — making it possible to build extremely sensitive detectors. The...
Attosecond Lasers Produce Electron Movies
CAMBRIDGE, Mass., Aug. 16, 2011 — Hoping to gain a clearer understanding of what happens during chemical reactions, a team of researchers is working to create a laser device that can release bursts of laser light to capture individual electrons as they orbit the nucleus — much...
Color Holograms Generated Using White Light
TOKYO, April 7, 2011 — A new technique uses ordinary white light instead of a laser to make three-dimensional color holograms that can be viewed at any angle, something that could prove useful in the next generation of 3-D displays, Japanese researchers report....
Carbon nanotubes as optical antennae
ITHACA, N.Y. – Researchers at Cornell University have found that carbon nanotubes’ light transmission behaves as a scaled-down version of radio-frequency antennae found in walkie-talkies, except that the interaction is with light instead of radio waves. The...
Using Electrons in Holography
BERLIN, Dec. 21, 2010 — Physicists at the Max Born Institute (MBI) in Berlin are returning to the principle of using electrons in holography. A special element in their approach is that the electrons that image the object are made from the object itself using a strong...
Taking the Twinkle Out of the Stars
TUSCON, Ariz., Aug. 4, 2010 — Star-gazers beware. Astronomers have developed a way to take the twinkle out of the night sky, but it’s really not as sinister as it may sound. Green guide star laser beams, used to sense turbulence in the atmosphere that badly degrades large...
Physicists Confirm Born’s Rule
INNSBRUCK, Austria & WATERLOO, Ontario, Canada, July 22, 2010 — Using a single-photon source, Austrian and Canadian quantum physicists said they ruled out the existence of higher-order interferences experimentally and confirmed an axiom in quantum physics: Born’s rule.
Nano-Sized Light Mill Drives Microdisk
BERKELEY, Calif., July 8, 2010 — Researchers have created the first nano-sized light mill motor whose rotational speed and direction can be controlled by tuning the frequency of the incident light waves. STM image shows a gammadion gold light mill nanomotor embedded in a 300...
Transformation Optics Makes a U-turn
BERKELEY, Calif., July 7, 2010 — In transformation optics, light waves can be controlled at all lengths of scale through the unique structuring of metamaterials, composites typically made from metals and dielectrics — insulators that become polarized in the presence of an...
Goulielmakis Wins Young Scientist Prize
GARCHING, Germany, July 6, 2010 — Dr. Eleftherios Goulielmakis, a research scientist at the Max Planck Institute of Quantum Optics in Garching, has been chosen as the recipient of the 2009 IUPAP Young Scientist Prize in Optics “for outstanding contributions in attosecond physics,...
Novel Metamaterial Responds to Visible Light
PASADENA, Calif., April 27, 2010 — An artificial optical material with a three-dimensional structure has been engineered to bend light in the “wrong” direction from what normally would be expected, irrespective of the angle of the approaching light. This new type of negative-index...
Imperfect Chips Enhance Quantum Technology
LYNGBY, Denmark, March 16, 2010 – A lot of effort is put into perfecting optical chips, which, among other applications, are used within quantum technology. However, a group at DUT Fotonik is saying that imperfectio...
Light Trumps Radio Waves in Security
STATE COLLEGE, Pa., Feb. 3, 2010 – Sending information through light waves is nothing new, but there are limitations. Existing wireless systems either require direct line of sight or are diffused and have low signal strength. Engineers at Penn State have taken a different approach...
Faster-Than-Light Photons
GAITHERSBURG, Md., Jan. 27, 2010 – By adding a single, strategically placed layer, a group of researchers sped up photons to seemingly faster-than-light speeds through a stack of materials. This experimental demonstration confirmed intriguing quantum-physics predictions that...
Nanoplasmonic Devices Funded
BELFAST, Northern Ireland, and LONDON, Sept. 4, 2009 -- Queen's University Belfast and Imperial College London will establish a research program on the fundamental science of nanoplasmonic devices under a new £6 million (about $9.8 million) grant from the Engineering and Physical Sciences Research...
'Rogue' Light Waves Tamed
LOS ANGELES, March 6, 2009 – Rare and explosive flare-ups known as "rogue" light waves have been tamed to produce brighter, more stable white light sources.
'Rogue' Light Waves Tamed
LOS ANGELES, March 6, 2009 – A rogue wave at sea spontaneously emerges and because of its enormity, can be extremely destructive for all in its path. However, rogue waves of light, which are rare and explosive flare-ups that are mathematically similar to their oceanic...
Grading Structure Traps Light
BETHLEHEM, Pa., Feb. 18, 2009 – The ability to catch light – and then let it go – will lead to improvements in telecommunication networks and other optical applications, according to researchers at Lehigh University’s Center for Optical Technologies (COT). Light waves transmit...
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...
Unruly Light Waves Tamed
ATLANTA, Oct. 9, 2007 -- Light waves become unstable and unruly as they are pressed through surfaces only a few nanometers apart and smaller than their wavelength, because there just isn't enough room for them to travel in a straight line. This makes the creation of...
Microscope Slide Enables ~70-nm Resolution
Jun 1, 2007 — Conventional optical microscopes can resolve objects on the order of only 200 nm because they are limited by the diffraction of light waves, meaning that small things such as DNA and viruses cannot be seen. Although both scanning probe and electron...
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May 2024
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