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(38,322 articles)
Popular News
Germany, US to Collaborate on Development of X-Ray Free-Electron Lasers
Dec 1, 2002 — Deutsches Elektronen Synchrotron in Hamburg, Germany, and Stanford Linear Accelerator Center in Menlo Park, Calif., have signed a memorandum of understanding to collaborate on the development of advanced x-ray free-electron lasers. The laboratories will share knowledge, equipment and personnel toward the design and construction of the Tera-electron-volt-Energy Superconducting Linear Accelerator Test Facility in Germany and the Sub-Picosecond Pulse Source in the US. Both institutions are...
Attosecond Spectroscopy Probes Atomic Cores
Dec 1, 2002 — It is possible to infer the lifetime of core holes by looking at the energy spectral width of the photons or electrons that are emitted following excitation of an atom, but until recently, physicists had been unable to observe the reorganization...
Conjugated Polymer Exhibits Phosphorescence
Dec 1, 2002 — Conjugated polymers are a class of materials that hold promise as a basis for electro-optical applications, but that promise has been blunted by the fact that electrical injection creates a substantial proportion of long-lived dark states. Now...
Photonic Crystal Laser Features Hexagonal Ring Resonator
Dec 1, 2002 — A team at Korea Advanced Institute of Science and Technology and at Electronics and Telecommunications Research Institute, both in Taejon, Korea, has demonstrated a photonic crystal laser with a hexagonal waveguide ring resonator. The photonic...
Light Manipulates Photon Tunneling
Dec 1, 2002 — Through photon tunneling, quantum physics allows for the transmission of light through apertures that classical physics would declare too small. The utility of this phenomenon has been limited because it is dependent on little more than geometry: A...
Femtosecond Laser Offers Solution for Dissolving Acid
Dec 1, 2002 — Dissolving acids in aqueous media is a fundamental process in many areas of chemistry. One process of interest is the acid ionization of hydrogen bromide in water. In the past, scientists believed that the minimum number of water molecules needed to...
Photonic Crystal Laser Features Low-Threshold Pumping
Dec 1, 2002 — Working with a cavity originally designed for cavity quantum electrodynamic experiments and nanospectroscopy, scientists at California Institute of Technology and the Jet Propulsion Laboratory, both in Pasadena, have observed lasing from photonic...
Femtosecond Laser Makes Color Images in Glass
Dec 1, 2002 — Researchers at Japan Science and Technology Corp. in Kyoto have demonstrated the space-selective precipitation of metal nanoparticles inside glass. The technique, which they described in the Oct. 14 issue of Applied Physics Letters, can be used to...
Laser Setup Approximates Quantum NOT Gate
Dec 1, 2002 — Contributing to the pursuit of an experimental quantum computer, researchers at Università degli Studi di Roma "La Sapienza," Slovak Academy of Sciences in Bratislava and National University of Ireland in Maynooth have demonstrated an optical setup...
Spectroscopy Quantifies Strain and Defects in Diodes
Dec 1, 2002 — As high-power laser diodes continue to make advances in various photonic applications, it is all the more important to understand the phenomena that can lead to lower outputs and lifetimes. A team at Max Born Institut für Nichtlineare Optik und...
Atomic Gas Is a Nearly Perfect Photon Counter
Dec 1, 2002 — Although proposed linear quantum computation schemes show promise, they are premised on photon counters with efficiencies greater than 99 percent -- beyond the reach of today's best devices. Ataç Imamoglu of the University of California, Santa...
Detection Method Measures Ultrasmall Volumes
Dec 1, 2002 — Refractive-index detection is commonly used in chemical and biochemical analysis to perform universal solute detection as well as temperature measurements in nanoliter volumes. Several approaches have been used to measure the change in refractive...
Crystal Shapes Optical Pulses
Dec 1, 2002 — Reporting in the Oct. 7 issue of Optics Express, a research team at Montana State University in Bozeman describes how it has shaped laser pulses using optical coherent transient processes in a Tm:YAG crystal. The technique has potential to enable...
CCDs Monitor Laser Damage
Dec 1, 2002 — At the University of California, Riverside, and Lawrence Livermore National Laboratory in Livermore, Calif., scientists have imaged in near-real time the damage to deuterated KDP caused by 68- to 80-J/cm2 pulses from a Q-switched Nd:YAG. They...
Transmission Through Holes Investigated
Dec 1, 2002 — Counterintuitively, shining light through an array of subwavelength-diameter holes can increase the transmission efficiency by orders of magnitude over that predicted by simple diffraction theory. Scientists at Seoul National University, Max Born...
Liftoff Enables GaN on Silicon
Dec 1, 2002 — Researchers at the University of California, Berkeley, and Oriol Inc. in Santa Clara, Calif., are using an excimer laser to separate LED heterostructures from their sapphire growth substrate so that they subsequently may bond them to silicon. Using...
Cascaded Ferroelectrics Steer Light
Dec 1, 2002 — The ability to electro-optically modulate the refractive index in ferroelectric materials promises to enable the development of ultrafast switches and scanners, but heretofore the scanning angles they offer have been limited. Now researchers at...
Daily News Briefs
Nov 29, 2002 — Robin Sawyer has been promoted to vice president, corporate controller and chief accounting officer, and Dave Henry has been appointed vice president of finance, worldwide operations, at Fairchild Semiconductor.
Boeing Satellite Launch Date Set
Nov 29, 2002 — ST. LOUIS, Mo., Nov. 29 -- A Boeing-built satellite that will increase NASA’s ability to provide clear communications in the busy radio environment of space is scheduled for launch on Dec. 4 from Cape Canaveral Air Force Station, Fla. The modified...
ESI Receives Samsung Order
Nov 28, 2002 — PORTLAND, Ore., Nov. 28 -- Electro Scientific Industries Inc. (ESI) said it has received a multisystem order from Samsung Electro-Mechanics Co. Ltd. for its model 5430 ultraviolet (UV) laser Microvia drilling systems. ESI said the systems will be...
FDA OKs GE Medical Systems Innova 4100
Nov 28, 2002 — WAUKESHA, Wis., Nov. 28 -- GE Medical Systems announced it has received 510(k) market clearance from the US Food & Drug Administration (FDA) for the GE Innova 4100, a large-format digital flat panel x-ray system that provides detailed, real-time...
Daily News Briefs
Nov 28, 2002 — Barbara Schremp, manager of university relations at Cypress Semiconductor Corp., has been invited to serve on the Materials Engineering Department Industrial Advisory Board of the California Polytechnic State University in San Luis Obispo, Calif.
The Foundry to Open Six European Centers
Nov 28, 2002 — PARIS, Nov. 28 -- The Foundry Inc., a training, research and development facility, announced it will open six regional Micro Foundry (µ–Foundry) centers in Europe to train and redeploy professionals and transfer 3,000 career positions from...
Kodak RSI Unit Helps Los Alamos Brain Researchers
Nov 27, 2002 — ROCHESTER, N.Y., Nov. 27 -- Scientists at the Los Alamos National Laboratory are using software developed by Eastman Kodak Co.'s Research Systems Inc. (RSI) unit to study the workings of the human brain, including efforts to better understand and...
Daily News Briefs
Nov 27, 2002 — Barry M. Granger has been named vice president and general manager of DuPont Imaging Technologies.
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August 2024
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