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Research & Technology News

Nanowires Produce Laser Light
Sep 1, 2001 — Researchers at the University of California and Lawrence Berkeley National Laboratory in Berkeley, Calif., have developed a 385-nm laser based on nanowires of zinc oxide. If the op...
Plastic Fiber Detects Methanol
KOFU, Japan -- KOFU, Japan -- Methanol is a promising energy source for fuel cells. But while the primary product of a methanol fuel cell is warm water, a leaky cell can pose a hazard because the...
Report: Optical Scanning Best for Voting
Sep 1, 2001 — On Dec. 15, 2000, two days after resolution of the US presidential election crisis, California Institute of Technology in Pasadena and Massachusetts Institute of Technology in Camb...
Retinal Chip Study Continues
Sep 1, 2001 — As part of the second round of clinical trials authorized by the Food and Drug Administration, surgeons have implanted microscopic chips in the eyes of three patients suffering fro...
RoboCup Comes to the US
Sep 1, 2001 — Teams from around the world participated in the fifth annual RoboCup competition in Seattle, the first time the event has been held in the US. Four classes of robots, including mod...
Silicon Structures Offer Tunable Bandgap
UNIVERSITY PARK, Pa. -- UNIVERSITY PARK, Pa. -- Tunable photonic bandgap materials show promise as light-modulation devices for telecommunications, display and data storage applications, but existing solu...
Simplicity Eases Image Retrieval
UNIVERSITY PARK, Pa. -- UNIVERSITY PARK, Pa. -- A picture is worth a thousand words, but computerized searches for a digital image involve only a few because they examine only the key words or description...
Space Missions Look to Light
PASADENA, Calif. -- PASADENA, Calif. -- To maximize the amount of data returned by space missions such as the Cassini-Huygens mission to Saturn’s moon Titan, compression techniques are used to reduce ...
Ultrasound Probes Laser Damage
LIVERMORE, Calif. -- LIVERMORE, Calif. -- Researchers at Lawrence Livermore National Laboratory are developing an ultrasound method to assess laser-induced damage to the vacuum optics in high-peak-flue...
Vision System Tells Who’s Who in the Nest
PITTSBURGH -- PITTSBURGH -- In recent years, computer scientists have used the study of social insects to improve their own work. So-called ant algorithms have been applied to the optimization o...
All-Optical Technique Creates Condensate
Aug 1, 2001 — Researchers at Georgia Institute of Technology in Atlanta have developed an all-optical method to produce Bose-Einstein condensates. All other condensates produced to this point have required the use of magnetic confinement. The physicists are...
Ceramic Laser Produces 72 W
Aug 1, 2001 — A team at the University of Electro-communications and Konoshima Chemical Co. Ltd. in Tokyo and at the Russian Academy of Sciences in Moscow has reported 1064-nm continuous-wave (CW) output from a polycrystalline Nd:YAG ceramic laser. Ceramic lasers...
Corning Glass Performs Well in Study
Aug 1, 2001 — A durability study performed by International Sematech Inc. of Austin, Texas, has found that Corning HPFS glass performs well under exposure to 193-nm light, said Corning Inc. of Corning, N.Y. The study examined the performance of fused silica...
Corral Sculpts Surface States
TOULOUSE, France -- TOULOUSE, France -- While pursuing an understanding of the factors influencing the photonic local density of states that determines electromagnetic interactions near a surface, a research team has designed a structure that can manipulate these...
Crystal Finds a Home in Lasers
RZBURG, Germany -- RZBURG, Germany -- Researchers at the University of Würzburg have employed a two-dimensional photonic crystal as a mirror in a ridge waveguide laser, an advance that they say could usher in the development of on-chip lasers for integrated...
Elastic Material Acts as Laser
Aug 1, 2001 — A team at the University of Freiburg in Germany and Kent State University in Kent, Ohio, has developed a laser based on a rubbery liquid crystal. Stretching the optically pumped material caused it to lase at different wavelengths, enabling the...
Energetic Helium Yields Superatoms
PARIS -- PARIS -- First realized in the lab during the last decade, Bose-Einstein condensates have offered scientists a unique material with which to pursue research. Now a new breed of helium condensate has been created that could lead to an even better...
Fiber Sensor Looks for Leaks
Aug 1, 2001 — A fiber optic gas sensor under development at Boeing Co. of Seattle and at Intelligent Optical Systems Inc. of Torrance, Calif., promises increased safety in aerospace and automotive applications. The companies demonstrated the sensor on a Delta IV...
Film Switches from Mirror to Window
BERKELEY, Calif. -- BERKELEY, Calif. -- Windows that switch between transmissive and reflective states could dramatically improve the energy efficiency of buildings, to say nothing of increasing the comfort level of their inhabitants. Rare earth and rare...
Gravity-Wave Detector Comes Online
TOKYO -- TOKYO -- Despite the best attempts of researchers, conclusive proof of the existence of gravitational waves has remained elusive. But several next-generation projects around the world with the sensitivity to detect these waves are coming into...
Interlayers Ease Mismatch Stress
Aug 1, 2001 — Efficient infrared and red vertical-cavity surface-emitting lasers will require high-quality AlGaN/GaN distributed Bragg reflectors, but the lattice mismatch between GaN and AlN leads to the formation of cracks. Now a research team from Sandia...
Laser Prototyping Advancing to Factory Floor
BETHLEHEM, Pa. -- BETHLEHEM, Pa. -- Researcher John DuPont, an assistant professor of materials science and engineering at Lehigh University, thinks the manufacturing sector needs to lighten up. He is collaborating with Sandia National Laboratories in Albuquerque,...
Laser Welding Project Planned
Aug 1, 2001 — Fraunhofer USA’s Center for Laser Technology in Plymouth, Mich., has announced an initiative to study the use of lasers to join miniature components for telecommunications and biomedical applications. The center is seeking industrial partners...
Liquid Crystal Adaptive Optics Speed Up
ALBUQUERQUE, N.M. -- ALBUQUERQUE, N.M. -- Conventional piezo technology, on which most adaptive optic arrays rely, tends to produce bulky, expensive and power-hungry devices. An alternative is liquid crystal arrays, which, with help from the video display industry, have...
Liquid Lenses Make Better Beams
AMES, Iowa -- AMES, Iowa -- To micromachine transistors, integrated chips and similar miniature devices requires lasers with narrow beams and small spot sizes that etch and cut cleanly and precisely. If drilling is done, the entrance and exit holes must be as...

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