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Research & Technology News
Matsushita Improves Silica Aerogel
Aug 1, 1997 — OSAKA, Japan -- A new waterproofing process could lengthen the lifetime and optical efficiency of silica aerogel, a material used in a variety of applications, including the cladding and protection of optical fiber. Created by researchers at Matsushita Electric Works, the new process involves putting a waterproof coating around the silica particles in the gel. Silica aerogel is a porous inorganic material made of 10-nm-long necklaces of silica molecules and microscopic air pockets. It has a...
Nanophotonics Moves Ahead
Aug 1, 1997 — Researchers at Northwestern University in Evanston, Ill., have constructed a nanoscale photonic resonator that is more than 100 times smaller than the cross section of a human hair. In combination with an equally minuscule semiconductor laser, the...
New Spectrometer Sheds Light on Chemical Mystery
Aug 1, 1997 — GLASGOW, UK -- Determining the absolute configuration of molecules is a prerequisite to developing new medicines. So-called chiral molecules are common and yet complex entities, existing in two forms that are mirror images of one another. Among the...
Single-Step QC Laser Emits at 8.5 µm
Aug 1, 1997 — In the latest development in quantum cascade laser research, a group of Northwestern University scientists reported an 8.5-µm emission from quantum cascade lasers grown in a single step by gas-source molecular beam epitaxy. In addition, the...
System Senses Individual Electrons
Aug 1, 1997 — MURRAY HILL, N.J. -- A system that can monitor and image individual electrical charges on and below the surface of semiconductor devices could be the next step in the never-ending quest for smaller, more powerful integrated circuits. Scientists at...
3-D Pits Boost Optical Storage
Jul 1, 1997 — EMERYVILLE, Calif. -- Two researchers have developed an encoding technique that could revolutionize the world of CD-ROMs and digital video discs, essentially tripling their storage capacity. To consumers, especially those eyeing the trend toward...
American Blue Diode Laser Pulses Atop Silicon Carbide Substrate
Jul 1, 1997 — DURHAM, N.C. -- Cree Research Inc. has demonstrated a pulsed blue semiconductor diode laser that operates at room temperature -- a first step in a race for a commercial device that would greatly increase optical storage capacity.The company's 403-nm...
Employees Can't Wash Away Restroom Sensor
Jul 1, 1997 — RED BANK, N.J. -- Mother always told us to wash our hands after visiting the bathroom. But Mom can't follow restaurant, hotel and hospital workers into the restroom at break time. Fortunately, photonics-based Hygiene Guard can ensure that the kid...
Excimer Lasers, High-NA Optics Push Lithography
Jul 1, 1997 — BALTIMORE -- Developments in excimer lasers and high numerical aperture optics technology are pushing photonics into the forefront of semiconductor microlithography, where laser-created feature sizes have already dipped below 0.25 µm.David...
Just One Second!
Jul 1, 1997 — To keep the world's atomic clocks synchronized with the Earth's rotation, the National Institute of Standards and Technology's Time and Frequency Div. added a "leap" second June 30. This is the 21st adjustment to the world's time scale since 1972...
Lidar Monitors Vapor, Wind
Jul 1, 1997 — Researchers at the Max-Planck-Institut für Meteorologie are developing a ground-based differential absorption lidar technique to remotely monitor water vapor and take wind measurements. A frequency-doubled Nd:YVO laser pumps a continuous-wave...
Pigment Holds Promise for 3-D Machine Vision, Optical Computing
Jul 1, 1997 — JERUSALEM -- A saltwater-borne bacterium may provide the key to the development of parallel optical computers and real-time 3-D robotic vision. Bacteriorhodopsin, the pigment protein derived from the bacterium, possesses unique electro-optical...
Putting Photons on Hold Improves Processing
Jul 1, 1997 — To store or process information encoded as light signals, it is often necessary to slow down strings of photons.A group of scientists from the University of Munich has developed a semiconductor device that serves as a quantum well, which...
Quantum Cascade Laser to Play Key Role in Gas Detection
Jul 1, 1997 — MURRAY HILL, N.J. -- A new laser-based sensor could mark a breakthrough in the detection of minute quantities of trace gases and pollutants.The exceedingly sensitive device is capable of detecting pollutants in parts per billion, according to one of...
Samarium Laser Emits X-Rays
Jul 1, 1997 — A group of British scientists successfully demonstrated the operation of a saturated nickel-like samarium x-ray laser beam at 7 nm with an output energy of 0.3 mJ in 50-ps pulses. The narrow divergence, short wavelength and pulse duration and...
Technique Offers Real-Time 3-D Microscopy for Materials
Jul 1, 1997 — JENA, Germany -- German microscope manufacturer Carl Zeiss Jena GmbH has developed a technique that it says provides three-dimensional, real-time microscopic images with the high resolution and sharp contrast of conventional light microscopy.The...
Two-Photon Imaging Offers Backside Peek at Chips
Jul 1, 1997 — Single-photon, optical beam-induced- current imaging is a valuable tool for the quality control of integrated circuits. However, this technique has become increasingly ineffective because of the large number of layers added to the front side of the...
Ultraviolet Laser Combines Steps in Wafer Doping
Jul 1, 1997 — SAN JOSE, Calif. -- An instrument that employs a laser doping process could combine the lithography and silicon doping steps in the manufacture of integrated circuits.The device, a deep-UV stepper using a technique that Ultratech Stepper Inc. calls...
US Strengthening Flat Panel Display Manufacturing Technology
Jul 1, 1997 — The United States Display Consortium, a group of flat panel display manufacturers and developers, has initiated 33 projects to bolster the US infrastructure and supply base.The consortium has committed $107 million to R&D projects over the past...
UV Imager Catches Comets Targeting Earth
Jul 1, 1997 — BALTIMORE -- Having a winning design for a satellite imaging device can have rewards beyond the recognition associated with winning a NASA contract. Just ask Iowa University's Louis A. Frank, who designed a UV/VIS imager to study the Earth's aurora,...
X-Ray Tool Aids Laser Design
Jul 1, 1997 — MURRAY HILL, N.J. -- Scientists at Bell Laboratories have developed a tool that uses x-ray technology to measure strain in small volumes of material for laser manufacturing and quality control applications.According to the company, the x-ray...
'Superlattice' Laser Achieves Record Power in the Mid-IR
Jun 1, 1997 — MURRAY HILL, N.J. -- Lucent Bell Laboratories researchers have reported measuring peak power of 750 mW from a pulsed 8-µm laser at liquid nitrogen temperatures.The device, a quantum cascade laser based on superlattice crystal structures,...
Air Force Lab Chills IR SensorsInternational Team Takes Mid-IR Laser Step
Jun 1, 1997 — Scientists have moved a step closer to achieving a tunable, mid-infrared semiconductor laser, demonstrating an intersubband stimulated emission.A team of researchers from the University of Illinois and the University of Paris conducted tests...
Conoscopy Measures with High Resolution
Jun 1, 1997 — JERUSALEM -- Manufacturers of electronic components and data storage equipment are among those who can benefit from the high (up to 0.04 µm) resolution of gauging instruments based on conoscopic interferometry.The technique exploits the...
Corning Completes Telescope Mirror Blank
Jun 1, 1997 — Corning Incorporated has delivered the second of two mirror blanks for the GEMINI project telescope, a multinational collaboration including the US, UK, Canada, Chile, Argentina and Brazil. The mirror blank measures more than 26 ft in diameter and...
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