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Basic Science News
Researchers Use Lasers To Make Photonic Bandgap Structures
Apr 1, 1997 — Photonic bandgaps are three-dimensional structures that can reflect electromagnetic radiation in a band of frequencies propagating in any direction. Scientists from the Max Planck Institute for Biophysical Chemistry have fabricated such structures using laser rapid prototyping via laser-induced direct-write deposition from the gas phase. To do this, they employed a continuous-wave argon-ion laser operating at 488 nm and approximately 2 mW, focusing to a spot size with a diameter of 5 µm....
Stay Tuned: Photonic Filters Color Your World
Mar 1, 1997 — Spectral information enhances our knowledge of astronomy, chemistry, metallurgy, and meteorology, and it contributes to applications in photonics, communications and medical instrumentation. Different specialties may use one of many spectral...
Imager Helps Standardize Process Transfers
Jan 1, 1997 — In the advanced materials processing arena, the use of low-pressure gas discharges is on the increase in applications such as the creation of submicron microchip architectures and thin diamond film deposition. Plasma conditions and processes are...
MSX Galaxy Maps Yield Highest Resolution
Jan 1, 1997 — The Midcourse Space Experiment (MSX) observatory-class satellite delivered mid-infrared maps of the center of our galaxy with a resolution 15 times better than the previous best taken by the Infrared Astronomical Satellite. The image at left is a...
New Phosphor View Promises Display Advances
Jan 1, 1997 — ALBUQUERQUE, N.M. -- A fresh insight into the nature of phosphors promises brighter, more colorful displays and, ultimately, a challenge to liquid crystals for dominance in the portable display market, say scientists at Sandia National...
Replica Molding: Complex Optics at Lower Costs
Jan 1, 1997 — Researchers at Harvard’s Chemistry Department are exploring new ways of fabricating complex, optically functional surfaces, components and devices using elastomers as starting materials. Organic polymers in elastomeric molds show promise because...
Laser Chemistry Moves Toward Smaller and Faster Probes
Dec 1, 1996 — Molecular-level studies examine the effect of individual molecules on the properties of chemistry and materials. Recent progress in such studies has relied on some new laser techniques: Ultrafast lasers have recently reduced the time scale to break...
Lasers Control Molecular Motion
Dec 1, 1996 — In quantum mechanics, interest has turned toward controlling, rather than explaining, atomic, molecular and electronic processes. The technology of coherent control employs light-induced interference to affect the dynamics of matter and assist in...
Lasers Offer Coherent Control of Material Behavior
Dec 1, 1996 — The goals of laser control in chemistry include manipulation of collective and molecular properties. Femtosecond lasers have already helped study crystal lattices, and more extensive manipulations are expected because of advances in laser pulse...
Researchers Count on Buckyballs to Create Tiny 'Abacus' for Processing
Dec 1, 1996 — Scientists at IBM Zurich in Switzerland have used a scanning tunneling microscope probe to reposition C-60 molecules, or "buckyballs," on a copper substrate, producing a room-temperature device that can store and manipulate numbers at a single...
'Artificial Nose' Uses Fiber Optics to Emulate the Real Thing
Nov 1, 1996 — MEDFORD, Mass. -- One of the most complex sensors of all -- the human nose -- is the inspiration for a fiber optic sensor that can detect and differentiate chemical vapors better than commercial electronic chemical-detecting devices. "Commercial...
Lobsters Serve as Inspiration for X-Ray Lithography Technology
Nov 1, 1996 — STURBRIDGE, Mass. -- A new lens design originally created for applications in astronomy, and based on the eye structure of a lobster, holds promise in the etching of ultrasmall electronic components on a chip. Nova Scientific Inc. and a team from...
Ohio State Seeks Role in Two Major Observatories
Nov 1, 1996 — COLUMBUS, Ohio -- Ohio State University is seeking a partnership role in two major observatories, one of which will house the world's largest telescope on a single mount. The university would buy a one-eighth share in the Large Binocular...
Researchers Use Femtosecond X-Ray Beams for Atomic Structure Studies
Nov 1, 1996 — Scientists at the Lawrence Berkeley National Laboratory in Berkeley, Calif., have generated a 300-fs-pulse x-ray for studying the motion of atoms during ultrafast physical and chemical processes. According to a paper published in Science, the team...
Smooth Plasma Would Improve X-Ray Lasers
LIVERMORE, Calif. — Smoothing the plasma from an x-ray laser amplifier could improve the device's efficiency by up to 50 percent, according to researchers at the Lawrence Livermore National Laboratory. The research team, led by Robert Cauble and Luiz Da Silva, made...
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April 2024
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