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Research & Technology News
Optoelectronic Devices Go Organic
CAMBRIDGE, UK -- CAMBRIDGE, UK -- Light-emitting diodes made from organic polymers were first developed at Cavendish Laboratory a decade ago. Now researchers at Cavendish have taken this technology a step further. The light that is emitted from these devices is typically controlled by sandwiching a polymer layer between two mirrors made from inorganic materials to form a microcavity. Peter K.H. Ho and colleagues at the lab, whose work appears in the July 9 issue of Science, have used layered structures of ...
Piezoluminescent Skin Senses Stress
Oct 1, 1999 — Physicists in Saga, Japan, deposited a film on a ceramic substrate that emitted strong visible light when it was mechanically stressed. The researchers from Saga University and the Kyushu National Industrial Research Institute suggested that the...
Research Trio Demonstrates AlGaN Camera That Images in UV, Digitally
Oct 1, 1999 — North Carolina State University in Raleigh, Night Vision Laboratory at Fort Belvoir, Va., and the Honeywell Technology Center of Minneapolis have completed a demonstration of a semiconductor-based, digital ultraviolet camera. The device employs a...
Semiconductors Deposited in Fiber Preforms
Oct 1, 1999 — Researchers at Syracuse University have developed a technique that could lead to the production of more efficient optical fiber devices. They employed optical deposition to create fiber preforms with a semiconductor layer at the core-cladding...
Superradiant Scattering
CAMBRIDGE, Mass. -- CAMBRIDGE, Mass. -- Researchers at the Massachusetts Institute of Technology studied Rayleigh scattering off a Bose-Einstein condensate, an experiment that produced superradiant scattering. As described in the July 23 issue of Science, the...
Ultrathin Films Retain Bulk Properties
UNIVERSITY PARK, Pa. -- UNIVERSITY PARK, Pa. -- Polymer films less than 100 nm thick have molecular properties nearly identical to the same material in bulk, according to recent findings of a study published in the July 8 issue of Nature. The findings confirm that thin...
’Dark Beams’ Revealed
Sep 1, 1999 — Researchers have tried to demystify the presence of "dark beams," complex arrays that result from emissions of broad-area vertical-cavity surface-emitting lasers. A team from Haifa University in Israel discovered that these dark spot arrays consist...
Array Speeds Protein, DNA Analysis
EDMONTON, Alberta, Canada -- EDMONTON, Alberta, Canada -- Researchers at the University of Alberta have developed a capillary electrophoresis system that can significantly speed protein analysis and DNA sequencing. Most commercial capillary electrophoresis systems have one...
Atom Detects Photon Without Destroying It
Paris -- Paris -- Catching light in a box has always been an alluring aspiration. Young children will slam the lid down on a ray of sunlight, hoping to capture its magic glow. The problem is, how do you know the light is in there if the lid is closed? And if...
Buckyball Emits White Light
Sep 1, 1999 — Unique C60 atom configurations known as buckyballs have attracted notice for their ability to quench light. Now a team of University of California researchers say they've discovered that buckyballs can also emit white light. The scientists added...
Chemical Laser Advances
CHAMPAIGN, Ill. -- CHAMPAIGN, Ill. -- Researchers at the University of Illinois have brought the chemical oxygen-iodine laser closer to the industrial market. A redesigned nozzle and nitrogen instead of helium as the buffer gas have made the device more efficient and...
CMOS Camera Won’t Be Blinded by the Light
DUISBURG, Germany — Photographers commonly find themselves in situations with too little or too much light. An inability to deal with changing brightness is a weakness of amateur and professional cameras.Cars could use recently developed CMOS imaging technology for...
Combined Spectroscopies Simplify Oil Detection
ERLANGEN, Germany -- ERLANGEN, Germany -- Mineral oils and fuels keep the world going, but they may also severely contaminate the ground and water. Laser-induced fluorescence spectroscopy has become a reliable tool for detecting such contamination, particularly for in...
Grating May Improve Spectrometers
TROY, N.Y. — Spectrometer manufacturers seeking to reduce the size and cost of their instruments may benefit from an innovation utilizing microelectromechanical systems technology. InterScience Inc. has developed a compound optical grating that could provide...
Laser Evaporation Yields Nanosize Particles
Sep 1, 1999 — Using a transverse-flow 4-kW CO2 laser, a group of scientists from F.-Schiller University in Jena, Germany, produced nanosize zirconia particles. The particles are prized for their extremely small dimension and shape. The group used two Q-switching...
Laser Maps Mars Topography Five Meters at a Time
CAMBRIDGE, Mass. — After more than 120 million measurements, the Mars Global Survey Spacecraft has given researchers more information on the topography of Mars than is known about Earth. The data -- gathered by the Mars Orbiter Laser Altimeter -- include topographical...
Laser Scans Circuits for Flaws
ALBUQUERQUE, N.M. — Researchers at Sandia National Laboratories have designed a method to fault-test integrated circuits quickly from the back using a laser. Light-induced voltage alteration scans a laser over a chip and watches for voltage changes. It improves both...
Laser Yields Real-Time Glimpse of Water Molecules
PARIS -- PARIS -- Using a homemade ultrafast laser, researchers have tinkered with liquid water molecules to achieve real-time observation of atoms flirting. Teams from the Centre National de la Recherche Scientifique -- one at the Université Pierre...
Light Scattering Measures Subangstrom Roughness
PORTLAND, Ore. -- PORTLAND, Ore. -- Hard disk drive manufacturers are looking for ways to increase storage capacity on the same hard drive. One way to accomplish this is to manufacture disks with ultrasmooth surfaces, placing requirements on the hard disk of the...
Optical Cross-Connect Reduces Loss
BOULDER, Colo. — When your office phone rings indicating an outside call, chances are the signal passed through an electronic switch somewhere in the building -- even if the incoming signal came off an optical fiber trunk line and traveled along glass fiber to your...
Slow It Down
Sep 1, 1999 — For the second time in six months, a team of researchers has succeeded in slowing laser light to a sluggish pace. Michael Kash and his colleagues at Texas A&M University in College Station heated a cloud of rubidium gas to 87 oC, then targeted a...
Superconductor ’Eyes’ IR Wavelengths
Sep 1, 1999 — A superconducting device that detects individual photons at longer wavelengths than was previously possible could have a far-reaching impact on advances in telecommunications and IR astronomy. Designed jointly by a researcher at the University of...
Technique Simplifies 3-D Molecular Research
CAMBRIDGE, Mass. -- CAMBRIDGE, Mass. -- Although scientists commonly use far-field polarization microscopy to measure the orientation of single molecules, it was thought that the technology could obtain only two-dimensional information. Now researchers at the...
Tetrahedron of Silver Balls Models Chaos of Light Beams
COLLEGE PARK, Md. — Get your laser pointer ready to create some (legal) chaos. Using a set of four silvered balls, each 12 inches in diameter, put three of the balls in a triangular pattern and add the fourth to the top to build a pyramid-shaped stack. Voila! You have...
Underwater Sensor Needs No Calibration
MISSOULA, Mont. — Researchers at the University of Montana have developed an autonomous chemical sensor that can be used in long-term studies of CO2 dynamics within bodies of water.Unlike most sensors, the fiber optic-based Submersible Autonomous Moored Instrument...
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July 2024
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