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Basic Science News
Laser Vibrometer on Track Toward a Quieter Highway
Oct 1, 1999 — Most citizens welcome the boost to local business that comes with a new or an expanded highway system, but few want traffic flowing anywhere near their back yards. Sound barriers erected along roadsides cost as much as $1 million per mile and reduce noise only for the nearest houses. For residents a block or two away, it's as though the wall isn't even there. Thus, noise pollution from highways has been a source of public contention at many town meetings, but officials have been able to offer...
Lasers Break an Optical Barrier
GÖTTINGEN, Germany — A team of researchers at the Max Planck Institute for Biophysical Chemistry broke the theoretical minimum for resolution by a focusing light microscope. More than 100 years ago, Ernst Abbe laid down the law that the wave nature of light limits...
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...
Researchers Create Fermi Degenerate Gas
Oct 1, 1999 — A collaborative project between scientists from the National Institute of Standards and Technology and the University of Colorado at Boulder used laser cooling to produce a gas of degenerate fermions. The researchers magnetically confined potassium...
NRC Discovery Reveals Ultrafast Processes
Sep 8, 1999 — OTTAWA, Canada, Sept. 8 -- Scientists at the National Research Council of Canada's (NRC) Steacie Institute for Molecular Sciences have developed a technique that reveals the ultrafast internal processes that lead to electronic-structural...
Adventures in Drug Discovery
Sep 1, 1999 — With billions of dollars at stake, pharmaceutical companies go to exotic lengths to find the cures for what ails us. And photonics goes with them. In the film Medicine Man, Sean Connery lived in a jungle treehouse where he searched for a cure for...
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...
Center for Adaptive Optics to Be Established
Sep 1, 1999 — For the first time in eight years, the National Science Board has approved another series of National Science Foundation Science and Technology Centers, including a facility for the study of adaptive optics at the University of California in Santa...
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...
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...
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...
Imaging Technique May Show Alzheimer's Progression
Aug 11, 1999 — CAMBRIDGE, Mass., Aug. 11 -- A team of scientists at the Harvard Institutes of Medicine is working to develop a non-invasive method to image plaque deposits in the brains of patients with Alzheimer's disease as the disease progresses. To date, the...
Camera Merges Disciplines to Produce 3-D Images
URBANA, Ill. — By combining technologies from medical imaging (computed tomography) and from radio astronomy (interferometry), researchers at the University of Illinois’ Beckman Institute for Advanced Science and Technology have developed a lensless camera...
Laser Program Suspended; Jobs Cut
LIVERMORE, Calif. -- LIVERMORE, Calif. -- Low unemployment rates in California softened the blow for 547 employees of a Lawrence Livermore National Laboratory uranium enrichment project. The conclusion of the 26-year laser-based project affected technicians in lasers,...
Microscope Records Chemical Makeup
MARTINSRIED, Germany -- MARTINSRIED, Germany -- Researchers at Max Planck Institut fur Biochemie have combined the atomic force microscope’s ability to define surface features with the infrared absorption techniques of spectroscopy to record chemical composition....
Near-IR Technique Sheds Light on Kinetic Reactions
Aug 1, 1999 — Chemists at Marquette University in Milwaukee have used a multispectral imaging spectrometer constructed with an acousto-optic filter and an InGaAs focal plane array to study the kinetics of curing an epoxy resin. The researchers’ results...
New Findings on Single-Shot Laser Pulse Damage
Aug 1, 1999 — Laser damage on short time scales is an area of active research. Because short pulses produce damage with a smaller statistical uncertainty than long pulses, femtosecond lasers for submicron-precision material removal have become attractive....
New Group Combines Alcatel's Optical Activities
Jul 13, 1999 — PARIS, France, July 13 -- Alcatel is creating Alcatel Optics, a new organization that will combine the company's operations in land and submarine transmission networking, optoelectronic components, and related research and development. The new group...
Lasers Burst Across a Frontier
LIVERMORE, Calif. — At Lawrence Livermore National Laboratory, researchers have crossed a threshold. They've constructed a laser that creates conditions until now found only in massive particle accelerators or in the centers of stars. At Lawrence Livermore National...
Livermore Closes Laser-Based Uranium Enrichment Program
Jul 1, 1999 — The Atomic Vapor Laser Isotope Separation program at Lawrence Livermore National Laboratory in Livermore, Calif., has been suspended, according to USEC Inc., an energy company based in Bethesda, Md., that sells enriched uranium and manages the...
New Method Looks Inside Living Cells
STANFORD, Calif. -- STANFORD, Calif. -- Many chemical reactions occurring in living organisms are both fast (in the microsecond to millisecond range) and spatially confined. Viewing biochemical processes in volumes from zeptoliters to femtoliters (1021 to 1015 liters)...
Novel LEDs Could Eliminate Bacteria
LONDON — A new resonant cavity light-emitting diode (LED) could help to eradicate antibiotic-resistant bacteria, emitting the necessary light (670 to 680 nm) to activate special bug-killing chemicals. Conventional LEDs are already used in photodynamic...
Optical Elements Highlight the Skies
Jul 1, 1999 — As astronomy expands the known universe, it pushes the boundaries of optical engineering. The European Southern Observatory recently unveiled a fiber-fed extended-range optical spectrograph, called Feros, high atop the Chilean Andes. The instrument...
Rydberg Atoms Enable High-Speed IR Imaging
AMSTERDAM, Netherlands -- AMSTERDAM, Netherlands -- Researchers at the FOM Institute for Atomic and Molecular Physics have developed an infrared imager that performs faster and with greater wavelength selectivity than most conventional long-wavelength cameras. Using the...
Stopped-Flow Device Improves Time-Resolved FTIR
Jul 1, 1999 — To perform long-path absorbance measurements for liquid samples, a luminescence detector cell must act as an optical fiber or waveguide. Otherwise, excessive noise results. And if the cell is to function as a liquid core waveguide, it must be made...
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May 2024
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