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Research & Technology News

Quantum-Dot Detector Spots Submillimeter-Wave Photons
Dec 1, 2001 — Doubling up can single out photons. A new submillimeter-wave detector promises the sensitivity to spot single photons. In contrast to existing single-photon-detection schemes, the detector does not require a magnetic field, and it offers an expanded wavelength range. The new technique could lead to better instruments for astronomy, chemistry and biology, as well as to the development of novel photonic devices. Developed by researchers at the University of Tokyo and at Japan Science and...
Recordable CDs Are Source of Gold Substrates
Dec 1, 2001 — Hua-Zhong Yu isn't burning mixes of MP3s from Napster with his stacks of recordable CDs. An assistant professor in the department of chemistry at Simon Fraser University in Burnaby, British Columbia, Canada, Yu is investigating recordable CDs as a...
Researchers Demonstrate Macroscopic Entanglement
Dec 1, 2001 — With one experiment, researchers have heartened Star Trek fans and quantum computing enthusiasts. A team at the University of Aarhus' Quantum Optics Center in Denmark has demonstrated quantum entanglement involving trillions of atoms over a distance...
Simple Bulk Optic Offers Simple Beam Control
Dec 1, 2001 — Bulk solid optics have helped circumvent the need to align multiple free-space optics within communications systems by substituting multiple mountings of discrete optical components with a single integrated optical unit. The same goal spurred...
Spectra Determine Fruit Ripeness
Dec 1, 2001 — If you have ever bought the "perfect" piece of fruit from the grocery store only to have it rot the next day, you know how tough it can be to find fruit that is ripe enough to eat -- but not overripe. Research being conducted at the University of...
Ultrafast Setup Machines and Measures
Dec 1, 2001 — Researchers at the University of Aarhus in Denmark have developed laser techniques for manufacturing and measuring on the microscopic scale. The method uses the same femtosecond laser pulses to ablate material and to profile depths on the...
Unmanned Vehicles Fly by Light
Dec 1, 2001 — By exploiting quantum mechanics, researchers at the Naval Research Laboratory in Washington have used free-space optics to communicate with unmanned aerial vehicles. The technique promises to allow data transfer and the control of fist-size fliers...
Xenon Source Offers Hemispheric Emission
Dec 1, 2001 — A team at the University of Central Florida in Orlando has demonstrated a differential-pumping scheme for a xenon capillary-discharge plasma source that enables the device to produce 11.3- and 13.5-nm light in a full hemisphere. The previous...
100-km Negative-Dispersion Fiber Carries 10 Gb/s
Nov 1, 2001 — To satisfy consumer demand for higher bandwidth in metropolitan-area networks, wavelength division multiplexing (WDM) systems must include economical, application-optimized components. Researchers have reported a new fiber with negative dispersion...
Brittle Star Features Calcite Lenses
Nov 1, 2001 — It has five arms and thousands of eyes, wears an armored plate and has been around for 500 million years. No, it's not a monster from a 1950s grade-Z sci-fi movie, but the brittle star Ophiocoma wendtii. And it may lead researchers to develop new...
Camera System Tracks in 360
Nov 1, 2001 — An automated omnidirectional tracking system developed by researchers at Lehigh University in Bethlehem, Pa., and at Columbia University in New York promises to help secure military installations and commercial buildings. The Lehigh Omnidirectional...
CARS Moving Beyond the Lab
Nov 1, 2001 — New research promises to take a technique that combines Raman spectroscopy and multiphoton three-dimensional microscopy beyond the research lab. Pioneered by Sunney Xie's group at Pacific Northwest National Laboratory in Richland, Wash., in 1999,...
Colorimetry Detects Beryllium
Nov 1, 2001 — Beryllium, three times lighter than aluminum and six times stronger than steel, is an attractive choice for many applications, including as a mirror substrate. But the inhalation of beryllium powder can cause a potentially fatal disorder of the...
Electrons Receive an Optical Kick
Nov 1, 2001 — Precisely timed bursts of light may help to explain the basics of chemistry. A research team at the University of California in Los Angeles has demonstrated that femtosecond laser pulses can temporarily, and in a controlled way, free electrons....
FEL Generates Second Harmonic
Nov 1, 2001 — Researchers at the Thomas Jefferson National Accelerator Facility in Newport News, Va., have demonstrated second-harmonic lasing in the infrared with a superconducting free-electron laser (FEL). In a report that appeared in the Aug. 20 issue of...
Fiber Network Enables Telesurgery
Nov 1, 2001 — Surgeons using robotic systems at Mount Sinai Medical Center in New York have performed a laparoscopic gallbladder operation on a patient 4000 miles away in Strasbourg, France. Reporting in the Sept. 27 issue of Nature, the medical team, which also...
Hizbollah Cameras Watch Israel
Nov 1, 2001 — Lebanon's Daily Star reported that Hizbollah has deployed dozens of surveillance cameras along the Israeli border following the Sept. 11 attacks on the World Trade Center in New York and on the Pentagon in Washington. The cameras, similar to systems...
Interfering Lasers Deliver Atoms
Nov 1, 2001 — The promise of nanotechnology is leading researchers to search for control over smaller and smaller amounts of matter. But the ideal, the manipulation of individual atoms, has been problematic, particularly when they must be delivered in a...
IR Wireless Signals High Bandwidth at Low Power
Nov 1, 2001 — Wireless infrared local-area networking is a flexible and economical alternative to hardwired interconnections. Unlike radio frequency transmission, both narrow- and wide-angle infrared communications can support high data rates, but at a cost....
Lawrence Livermore Develops 13-kW Solid-State Laser
Nov 1, 2001 — Researchers at Lawrence Livermore National Laboratory in Livermore, Calif., have delivered a prototype solid-state heat-capacity laser to the US Army's High Energy Laser System Test Facility in White Sands, N.M., for testing. The goal of the project...
LEDs Learn from Solar Cells
Nov 1, 2001 — A silicon LED with a conversion efficiency 100 times better than current devices promises to enable the integration of LEDs with microchips. The development could eliminate the need for wires for intra- and interchip communication and the electronic...
Liquid Crystal, Dye Yield Solar Cells
Nov 1, 2001 — A team from Cambridge University and Cambridge Display Technology Ltd. of Cambridge, UK, and from Max Planck Institut fur Polymerforschung Ackermannweg of Mainz, Germany, has created organic photovoltaic cells by mixing liquid crystal with perylene...
Microscope Offers Portable Raman
Nov 1, 2001 — Raman imaging just got a little easier. For the past couple of years, the department of chemistry at Purdue University in West Lafayette, Ind., has offered chemists, pharmacists and engineers the use of its near-infrared Raman imaging microscopy...
NASA Produces Fresnel Mold
Nov 1, 2001 — The Space Optics Manufacturing and Technology Center at NASA's Marshall Space Flight Center in Huntsville, Ala., has completed a master mold for the production of Fresnel lenses, using its unique diamond-turning equipment. The lenses will be...
Oscillators Going Optical
Nov 1, 2001 — OEwaves Inc. of Pasadena, Calif., has developed a high-frequency oscillator that the company hopes will replace the quartz ones found in communications devices. It plans to produce optoelectronic oscillators for optical network transmitters by...

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