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(38,322 articles)
Popular News
Free-Electron Laser Ionizes Clusters
Jan 1, 2003 — Investigations at Deutsches Elektronen Synchrotron in Hamburg, Germany, into the interaction of high-intensity, deep-UV radiation from a free-electron laser with clusters of xenon suggest that physicists will have to revisit their understanding of absorption processes. A report of the work appeared in the Dec. 5 issue of Nature. The researchers exposed clusters of 1500 xenon atoms to 100-fs pulses of 98-nm radiation from the free-electron laser at power densities of up to 7 x 1013 W/cm2. At...
Microdischarge Studied for Detectors
Jan 1, 2003 — Scientists at the University of Illinois in Urbana and at Ewing Technology Associates in Bellevue, Wash., are investigating the photosensitivity of silicon microdischarge devices. Experiments at the university, reported in the Dec. 9 issue of...
Coating Tested for Large Binocular Telescope
Jan 1, 2003 — Bruce Atwood and his team at Ohio State University's Imaging Sciences Laboratory in Columbus are beginning full-scale tests of coating equipment designed to aluminize the two 8.4-m primary mirrors for the Large Binocular Telescope. The system will...
Hollow Fiber Transmits CO2 Laser Radiation
Jan 1, 2003 — Researchers at Massachusetts Institute of Technology in Cambridge have produced wavelength-scalable hollow optical fiber that can transmit enough of the output of a 25-W CO2 laser to burn holes in paper and PES film. Even with maximum laser power...
Laser Sensors Monitor Bus Exhaust
Jan 1, 2003 — Researchers from Aerodyne Research Inc. of Billerica, Mass., the New York state Department of Environmental Conservation in Albany and State University of New York at Albany reported their findings on the emissions of passenger buses at the fall...
Reconsidering What 'Visible' Means
Jan 1, 2003 — Laser safety standards have called the spectral band between 400 and 700 nm "visible" for Class 2 lasers since the drafting of the first ANSI Standard in the early 1970s. Although it's technically true that these wavelengths are visible, a wider...
Microscopy measures 40-nm-diameter fluorescent objects
Jan 1, 2003 — Using spatially modulated illumination microscopy, scientists at the University of Heidelberg in Germany have measured nanoscale fluorescent objects beyond the limits of conventional high-resolution fluorescence microscopy. Accuracy was 90 to 95...
Few Atoms Control Light Propagation
Jan 1, 2003 — Scientists from the University of Tokyo and the National Institute of Standards and Technology in Gaithersburg, Md., have reported that a small number of atoms in a high-finesse microcavity can control the propagation of light pulses. Previous...
Photon Turnstile Improves Cryptography
Jan 1, 2003 — In pursuit of more reliable quantum cryptography systems, a team at Stanford University in California and NTT Basic Research Laboratories in Atsugi, Japan, has demonstrated a system that incorporates a photon turnstile, which enables it to support...
Semiconducting Wires Improve Polymer LEDs
Jan 1, 2003 — European researchers have performed a balancing act that may lead to inexpensive and large-scale illumination, low-power and expansive flat panel displays, and other applications of polymer light-emitting devices. Traditionally, polymer LED design...
Encapsulation Key to In Vivo Imaging
Jan 1, 2003 — Recent research indicates that quantum dots could someday replace fluorescent markers, such as organic dyes and fluorescent proteins, in some biological imaging applications. To compete, though, these nanometer-scale semiconductor crystallites must...
New Materials Enable Dense Data Storage
Jan 1, 2003 — A team at Boston College in Chestnut Hill, Mass., and Massachusetts Institute of Technology in Cambridge has discovered a class of materials that may offer an efficient and robust method of ultradense data storage based on multiphoton absorption....
Nd:YVO4 Laser Offers 200 kHz
Jan 1, 2003 — Advanced Optical Technology Ltd. of Basildon, UK, has reported the development of a 200-kHz electro-optically Q-switched laser. Such high-repetition-rate devices may find use in industrial, medical and telecommunications applications. Sharing in the...
Electronic Nose Uses Standard Monitor
Jan 1, 2003 — An electronic nose under development at Linköping University in Sweden may be able to detect the odors of spoiled food in your kitchen before you catch a whiff of them. An offshoot of the scanning light pulsed technique, in which a scanning laser...
Reflectivity Yields Fresnel Lenses
Jan 1, 2003 — Continuing their work with photoinduced reflectivity, scientists at W.W. Hansen Experimental Physics Laboratory at Stanford University in California have produced transient diffractive optical elements in semiconductor wafers by optical stimulation....
Plastic Electro-Optic Modulators Show Potential
Jan 1, 2003 — Although the need for modulation at terahertz rates for telecommunications may be years away, researchers at Lucent Technologies' Bell Labs in Murray Hill, N.J., are working on plastic electro-optic modulators to do just that. Recently, Mark Lee and...
Efficient Silicon LED Demonstrated
Jan 1, 2003 — Researchers at STMicroelectronics in Catania, Italy, have reported the development of a silicon LED with what they claim is a world-record emission efficiency. To make the device, Salvo Coffa and his colleagues used ions of rare-earth metals such as...
X-Ray Laser Funding Approved
Jan 1, 2003 — A group of researchers at Stanford Linear Accelerator Center in Menlo Park, Calif., are looking forward to seeing the world in a new light with the Linac Coherent Light Source. The x-ray free-electron laser is a step closer to reality with the...
Spectra Identify Nanotube Species
Jan 1, 2003 — Chemists at Rice University in Houston have reported that spectrofluorometry is an effective tool in identifying various species of single-walled carbon nanotubes. They suggest that the technique may be used to guide the selective production of...
Deposition Achieves 12 nm/cycle
Jan 1, 2003 — A team of scientists at Harvard University in Cambridge, Mass., has demonstrated an atomic layer deposition process that yields conformal layers of amorphous silicon dioxide and aluminum oxide nanolaminates at a rate of 12 nm per 30-second cycle....
MagiQ Readies Quantum Code System
Jan 1, 2003 — MagiQ Technologies Inc. of New York has announced plans for the commercial release of its Navajo quantum cryptography product. The quantum key distribution system will transmit entangled photons over fiber optics, enabling users to create secure...
Quantum Dots, Photonic Crystal Form LED
Jan 1, 2003 — Scientists at the University of Michigan in Ann Arbor have reported an electrically driven LED comprising InAs/GaAs quantum dots in a GaAs photonic crystal structure. They described the fabrication and operation of the 1.04-µm emitter in the Nov. 11...
Satellite Images Plankton Bloom
Jan 1, 2003 — Images from the Envisat satellite released by the European Space Agency displayed a 300 x 200-km phytoplankton bloom in the seas off Nova Scotia and Newfoundland in Canada from July 24 to Aug. 13, 2002. Although such blooms are not uncommon, they...
Networked Computers Support Data-Intensive Applications
Jan 1, 2003 — Massive amounts of data from multiple storage sites connected by optical networks can be interactively visualized, analyzed and correlated with the OptIPuter, a distributed computer under development in a project headed by the California Institute...
Motion Sensors Compensate for Image Blurring
Jan 1, 2003 — Using integrated accelerometers to detect the vibration in an imaging system, suggest researchers at Ben-Gurion University of the Negev in Beersheba, Israel, offers an accurate means to correct for displacement and blur. In a report of the technique...
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August 2024
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