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(9,091 items)
Research & Technology News
Crystal Films Grow on 'Universal' Substrate
Jun 1, 1997 — Cornell University researchers are in the preliminary stages of demonstrating that crystals of any material can be grown on a substrate. If the technique proves successful, it could open the door for manufacturing a whole new class of optoelectronics devices including lasers, detectors, sensors and imaging systems. A major obstacle to the manufacture of various semiconductors is that single-crystal semiconductor thin films must be deposited on a crystal of the same lattice structure, otherwise...
Dutch Group Monitors Laser Deposition
Jun 1, 1997 — Pulsed laser deposition creates complex oxide thin films such as high-Tc superconductors, but it works only under high oxygen pressure (up to 100 Pa). Reflection high energy electron diffraction (RHEED) can monitor the growth of thin films, but only...
Integrated Circuit Uses 'Critters' to Detect Contamination
Jun 1, 1997 — OAK RIDGE, Tenn. -- What's half living, half machine and can sniff out pollutants and chemicals in a single whiff? The latest microsensor technology from the US Department of Energy's Oak Ridge National Laboratory (ORNL) combines living luminescent...
IR Instrument Vows Early Warnings of Volcanic Eruptions
Jun 1, 1997 — TEMPE, Ariz. -- Hollywood's recent fantastic images of fiery lava engulfing entire cities might be a slight exaggeration, but the danger of volcanoes to humans is all too real, especially to researchers seeking a closer look at what makes these...
Lab Produces Tunable Mid-IR Laser
Jun 1, 1997 — Researchers at Lucent Technologies' Bell Laboratories have produced a pulsed, single-mode laser tunable in the mid-infrared range. The group achieved peak optical powers up to 60 mW at 300 K with a tuning range of about 60 nm from 100 K to 2320...
New Cantilever Boosts SFM Resolution
Jun 1, 1997 — STANFORD, Calif. -- Stanford University researchers have combined an interferometric diffraction grating with light-reflecting scanning force microscope cantilevers in a way that could result in a tenfold increase in the resolution of commercially...
New Photoresist Shrinks Features
Jun 1, 1997 — SAN FRANCISCO -- Integrated circuit manufacturers are taking a very close look at a single-layer photoresist that scientists say will support component design smaller than 0.18 µm, with the promise of 0.13-µm design capability within a...
Photonics Solves the Wafer Temperature Problem
Jun 1, 1997 — SANTA CLARA, Calif. -- As a semiconductor wafer wends its way through the fabrication process it passes through several stages where thermal processing plays a key role.Conventional techniques require that manufacturers stop the process, remove the...
Polymer Connectors Challenge Costlier Rivals
Jun 1, 1997 — HARRISBURG, Pa. -- As the saying goes, you get what you pay for. But according to a new study, the fiber optics industry could be getting more than that.Researchers at AMP Inc., a manufacturer of electrical and electronic interconnection systems,...
Researchers Predict Multicolor LED World
Jun 1, 1997 — ROCHESTER, N.Y. -- Dreams of ultrathin displays for computer and television screens could become a reality, thanks to a plastic light-emitting diode that emits light in several colors.LEDs are everywhere; clock radios, microwave timers, dashboard...
Ring Monitors Homebound Patients
Jun 1, 1997 — CAMBRIDGE, Mass. -- It resembles a cross between a trinket in a gumball machine and a space-age gizmo seen on Star Trek. Despite its curious appearance, this newly developed photosensor ring performs a serious task: It monitors the pulse rate and...
Speedy Camera Finds Undersea Mines
Jun 1, 1997 — Scientists at Los Alamos National Laboratory have found a way to detect underwater mines over vast expanses of ocean by employing a camera system developed to image nuclear tests in the 1960s.A pulsed laser mounted with a charge-coupled device in an...
Supercooling Technology for Satellites
Jun 1, 1997 — The US Air Force and NASA have developed a supercooling technology for satellites that enhances the performance of onboard infrared sensors.Launched aboard the space shuttle Columbia in April, the cryogenic heat pipe is designed to lower internal...
Tiny Images Could Win Big
Jun 1, 1997 — Nikon Inc. is conducting its 23rd Annual Nikon International Small World Competition, honoring excellence in photography through a microscope.Each participant can submit up to three 35-mm transparencies of photos taken using a light microscope....
Zinc Oxide Holds Promise as LED Material
Jun 1, 1997 — In the quest to produce efficient and lasting blue light-emitting diodes, one material has been largely overlooked -- zinc oxide.Although ZnO has a room-temperature band gap of 3.37 eV and high exciton binding energy, scientists have focused more on...
Amplifier Promises To Improve Charge-Coupled Devices
May 1, 1997 — LOS ALAMOS, N.M. -- A charge-coupled device (CCD), the component that converts light into electronic signals in scientific and commercial imaging instruments, is only as good as its amplifier. A new amplifier developed at Los Alamos National...
Colorful Laser Aims at Inspection, Displays
May 1, 1997 — LOS ALAMOS, N.M. -- Laser displays and semiconductor inspection could be the future applications for a fiber-based solid-state laser that emits in the red, orange, green or blue.The discovery was, in large part, an accident. Timothy Gosnell and Ping...
Conference Highlights Medical, Entertainment Laser Safety
May 1, 1997 — ORLANDO, Fla. -- A better understanding of the hazards of the surgical laser plume, real-time videos of retinal laser lesions in live animal's eyes and an in-depth examination of endotracheal laser accidents were among the highlights of the Third...
Cryogenic Expansion Blurs Hubble Images
May 1, 1997 — Expanding nitrogen used to cool infrared detectors inside the Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer has caused one of the instrument's cameras to go out of focus. NASA scientists detected the foul-up shortly...
Diode Lasers Are at the Heart of Cardiac Monitoring System
May 1, 1997 — CAMBRIDGE, Mass. -- Since 1970, doctors have injected patients with iced saline to measure their hearts' blood output. Periodic injections provide reliable results but do not allow doctors to constantly monitor patients.An infrared irradiating...
Don't Blink! Ultrafast Diffraction Captures Complex Phenomena
May 1, 1997 — PASADENA, Calif. -- Scientists at the California Institute of Technology have demonstrated a technique for producing light in femtosecond pulses, giving molecular chemists a peek at previously invisible chemical processes. Ahmed Zewail and his...
Frequency-Doubled Red Diode Laser Produces Ultraviolet Light Efficiently
May 1, 1997 — Japanese researchers have taken another step toward a compact ultraviolet light source that has great potential in high-density optical storage and biomedical applications. Scientists at Matsushita Electric Industrial Co.'s Development Center in...
Infrared Camera Decloaks Invisible Flames
May 1, 1997 — A shoebox-size infrared camera could be a firefighter's most effective weapon in avoiding deadly invisible flames from hydrogen or alcohol fires. Engineers at NASA's John C. Stennis Space Center in Mississippi discovered that filters on...
Lab Wants to Slap Enemies Senseless
May 1, 1997 — LOS ALAMOS, N.M. -- Some folks think that the US military's vast stockpile of so-called antiquated weapons should be destined for the trash bin, when all they really need is a good slap. Scientists at Los Alamos National Laboratory are developing a...
Laser Machines Microthrusters
May 1, 1997 — LOS ANGELES -- As part of a program to create a mass-producible nanosatellite, scientists at the Aerospace Corp. are developing batch material processing techniques that use UV lasers to create complicated 3-D micro- and mesoscale structures in...
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July 2024
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