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(38,322 articles)
Popular News
Nanoclusters Form Logic Gates
Apr 1, 2003 — Tae-Hee Lee and Robert M. Dickson of Georgia Institute of Technology in Atlanta have produced AND, OR, NOT and XOR logic gates using electroluminescent silver nanoparticles. Reported in the March 18 issue of PNAS, the optoelectronic devices promise to open the door for the development of molecular-scale electronics, including computers. Lee and Dickson exposed thin films of silver to a voltage-limited current for approximately 30 seconds, creating arrays of nanoscale break junctions and...
Ultrafast Laser Creates Spin-Entangled Electrons
Apr 1, 2003 — A research team at the University of Michigan in Ann Arbor and the University of Notre Dame in Indiana has reported the entanglement of three electrons in a CdTe quantum well using ultrafast laser pulses. The work, which was published in the March...
Facial Recognition Study Released
Apr 1, 2003 — The National Institute of Standards and Technology, the Defense Advanced Research Projects Agency and the US Department of Defense's Counterdrug Technology Development Program Office have released their evaluations of 10 commercial face-recognition...
Cassini Images of Jupiter Studied
Apr 1, 2003 — En route to Saturn, the Cassini spacecraft, a joint mission of NASA, the European Space Agencyand the Agenzia Spaziale Italiana, took advantage of its Jupiter flyby to test its two-camera Imaging Science Subsystem, collecting approximately 26,000...
Optical Fractionation Presented
Apr 1, 2003 — Researchers from the University of Chicago presented their findings on the use of light to continuously sort microscopic particles at the March meeting of the American Physical Society in Austin, Texas. The technique, which they call optical...
Scrambling to Reduce Polarization-Related Impairments
Apr 1, 2003 — Polarization is a fundamental property of light. In classical physics, light is modeled as a sinusoidal electromagnetic wave in which an oscillating electric field and an oscillating magnetic field propagate through space. Polarization is defined in...
Picking Up the Pace of Rapid Manufacturing
Apr 1, 2003 — By one estimate, rapid prototyping equipment generates more than 3 million models and prototypes annually. Even with the recent slowdown in the market, this figure will most likely continue to rise. Development work by equipment manufacturers and...
Infrared Detectors Image the Future
Apr 1, 2003 — The ability to see beyond the capabilities of normal human vision is vital in areas such as emergency services, defense, science, maintenance and surveillance, and all of these areas stand to gain by the latest advances in infrared imaging...
Getting the Small Picture
Apr 1, 2003 — Anadigics Inc. of Warren, N.J., is a semiconductor company that helps provide the gift of gab -- and data, too. Its gallium-arsenide integrated circuits are used in both wired and wireless telecommunications systems, and although its products...
Minimizing Error and Maximizing Precision in Microassembly
Apr 1, 2003 — Precision assembly solutions are as unique as the products they are built to automate, especially in the photonics world. Progressive assembly operations such as guiding, gluing and bonding sometimes take place in a local region around a static...
Quartz Crystal Thin-Film Monitoring Forges Ahead
Apr 1, 2003 — Research in fields such as nanotechnology, biosensors, thin-film displays and high-speed optical communications has increased the complexity of thin-film structures. Although an antireflection coating consisting of a single layer of magnesium...
Illumination Design Gets Faster, Easier
Apr 1, 2003 — From cell phones to automotive dashboards, illuminated displays have become commonplace. Historically, they were designed with rudimentary software tools, and, consequently, many prototype iterations were required. But in the past decade, the...
Femtosecond Laser Probes Plasma Formation
Apr 1, 2003 — Pump-probe experiments employing femtosecond lasers have exposed the dynamics of numerous ultrafast phenomena. Researchers at Univer-sité Claude Bernard Lyon 1 in Villeurbanne, France, and the US Army Research Laboratory in Adelphi, Md., have...
Femtosecond Techniques Herald Attophysics
Apr 1, 2003 — In pursuit of shorter and shorter sources of illumination to probe dynamic physical phenomena, researchers at Technische Universität Wien in Austria and at Max Planck Institut für Quantenoptik in Garching, Germany, have used femtosecond techniques...
Planar Laser Shows Promise
Apr 1, 2003 — A team of scientists at the University of Southampton in the UK has presented its findings on a diode-pumped Nd:YAG laser fabricated as a planar waveguide. The laser offers advantages in terms of efficiency and a low lasing threshold that suggest...
Filter Enables 23-Channel Laser
Apr 1, 2003 — Transmitters for dense wavelength division multiplexing (DWDM) consist of banks of lasers, with one laser for each channel. It would be nice if a single laser could produce a comb of frequencies exactly aligned with the channels. Researchers at Bell...
Porous Silicon Emits Blue Light
Apr 1, 2003 — Researchers at the University of Science and Technology of China in Hefei report strong emission around 435 nm from porous silicon, which could facilitate the integration of silicon LEDs and electronics on one chip. To build the sample, they etched...
Dielectrophoresis Builds Photonic Crystals
Apr 1, 2003 — Scientists at the University of Delaware in Newark, Carnegie Mellon University in Pittsburgh and North Carolina State University in Raleigh have assembled one- and two-dimensional photonic crystals by exposing microspheres to an alternating electric...
Terahertz Quantum-Cascade Laser Is Created
Apr 1, 2003 — Although the terahertz frequency range has long remained undeveloped because of a lack of compact coherent radiation sources, this may soon change. Researchers at Massachusetts Institute of Technology in Cambridge have developed a 3.4-THz...
Tweezers Employ Three Forces
Apr 1, 2003 — Using a Michelson interferometer in a double-hologram setup, researchers at Nanyang Technological University in Singapore have demonstrated a new type of optical tweezers based on the interference of Laguerre-Gaussian beams. The system, which is...
Laser Produces T-Ray Diffractive Elements
Apr 1, 2003 — To ease the integration of components for terahertz spectroscopy and signal processing, a team at Massachusetts Institute of Technology in Cambridge has fabricated integrated diffractive elements in LiNbO3 using femtosecond pulses from an amplified...
Ruby Crystal Slows Light at Room Temperature
Apr 1, 2003 — Over the past few years, researchers such as Lene Vestergaard Hau of Harvard University in Cambridge, Mass., have reported fantastic experiments in which they slow light to a crawl --and even stop it temporarily -- in ultracold clouds of atoms. Now...
Er:Fiber Laser Suitable for Optical Clocks
Apr 1, 2003 — Scientists at Technische Universität München in Garching and at Ludwig Maximilians Universität München in Munich, both in Germany, have presented an erbium-doped fiber laser system that offers 110 mW of linearly polarized output power in 65-fs...
Daily News Briefs
Apr 1, 2003 — Cymer Inc., a supplier of excimer light sources used in semiconductor manufacturing, announced that Young K. Sohn and Edward H. Braun have joined its board of directors and that Richard P. Abraham has retired from the board, which has been expanded...
L-3 Communications Acquires Avionics Systems
Apr 1, 2003 — NEW YORK, April 1 -- L-3 Communications announced yesterday it has completed the acquisition of Avionics Systems, a former Goodrich Corp. division. The total value of the transaction is approximately $188 million in cash. The new business unit, L-3...
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August 2024
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