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(38,345 articles)
Popular News
ORA Announces Design Competition Results
Oct 1, 2007 — Optical Research Associates of Pasadena, Calif., has announced the winners of its annual Student Optical Design Competition. Awards totaling $4000 were presented to students in North America working toward bachelor’s, master’s or doctoral degrees who utilized the company’s CODE V or LightTools software in their optical design or engineering research. The 2007 top winners included Manuel Guizar-Sicairos, a PhD candidate from the University of Rochester in New York, for his paper “Design of 360...
Companies Partner for Nanopositioning Systems
Oct 1, 2007 — The Value Engineering Alliance of Cambridge, Mass., and the DTI-NanoTech division of Discovery Technology International LLLP of Sarasota, Fla., have allied to promote the development, implementation and acceptance of nanopositioning systems for...
DRS Technologies Awarded Navy Contract
Oct 1, 2007 — DRS Technologies Inc. of Parsippany, N.J., has received a $26 million contract, with the option of an additional $23 million, to produce, integrate, test and deliver thermal imagers for the MK 15 Phalanx close-in weapon system. The Phalanx is...
Northrop Grumman to Provide Laser Locators
Oct 1, 2007 — Northrop Grumman Corp. of Los Angeles has been awarded a $17.5 million contract by the US Army to provide more than 500 handheld laser target locators to assist soldiers in identifying enemy targets. The Mark VII can be used for surveillance and for...
New Gluing Technique Rejuvenates Abandoned Lasers
Oct 1, 2007 — During the late 1990s, scientists investigated Q-switched microchip lasers that were fabricated by pressing a thin slab of laser material — usually, but not always, Nd:YAG — between an output coupler and a semiconductor saturable absorber mirror...
Silicon Turns One Wavelength into Many
Oct 1, 2007 — There are many challenges to be overcome before photonic connections can replace electronic ones in computers and other equipment. Nonetheless, that replacement soon will become imperative because miniaturization is driving electronic interconnects...
Lasing Action from Whispering-Gallery Modes in Water Microdroplets
Oct 1, 2007 — Whispering-gallery modes are the resonances that occur inside round objects (spheres, cylinders, disks) when light bounces around the object’s circumference, restrained by total internal reflection to stay inside the object. The modes can be useful...
A Higher-Temperature Quantum Dot Infrared Photodetector
Oct 1, 2007 — Researchers at the University of Massachusetts Lowell and at Raytheon Missile Systems in Tucson, Ariz., have produced a long-wave infrared quantum dot photodetector with a responsivity of 2.5 A/W at operating temperatures as high as 190 K (–83 °C)....
Turning Opaque Materials into Lenses
Oct 1, 2007 — Materials with a milky-white appearance hardly seem a likely choice for making lenses. Any light that manages to penetrate such materials comes out the other side in a faint, random speckle pattern. By shaping the wavefront of laser light entering...
Coupling Between Energy Levels Leads to Optical Bistability
Oct 1, 2007 — Optical bistability exists when an optical system is capable of operating in two modes under identical external conditions. If the optical system is a laser, the most common form of optical bistability is hysteresis in its input-output transfer...
Building a Nanostructure Array One Slice at a Time
Oct 1, 2007 — Researchers at Harvard University in Cambridge, Mass., have employed a nanoscale version of skiving — cutting a material into thin layers — to create large-area arrays of patterned metallic structures. By producing frequency-selective surfaces, the...
Defining the Relationship Between Nanotube Length
and Optical Response
Oct 1, 2007 — Single-walled carbon nanotubes have numerous optical properties of interest to physicists and electronics engineers. However, whereas these nanometer-scale constructs have been well-studied regarding the influence of diameter and chirality on their...
Spotting Very Thin Graphite Layers
Oct 1, 2007 — Researchers are focusing on graphite monolayers, called graphene, because of their electrical and optical properties. In their quest to use graphene to build devices, however, they confront a basic problem. The simplest technique for producing the...
Microscopy Used to Profile Refractive Index
Oct 1, 2007 — A microscopy technique that measures the refractive index profile of an optical waveguide has been devised by researchers in Taiwan. An accurate profile is used, in turn, to determine the mode properties of the waveguide, which are important in...
High-Energy X-Rays Used to Unroll Fragile Ancient Scrolls
Oct 1, 2007 — At the recently held 2007 Festival of Science sponsored by the British Association for the Advancement of Science, Tim Wess and his colleagues at the UK’s University of Cardiff Institute of Vision announced that they have developed a method for...
Review Provides Blueprint for Optical Nanocircuits
Oct 1, 2007 — Increasing the clock speed of an electronic device can affect its interaction with light and other electromagnetic waves that pass through it. Controlling light in this way may enable the creation of superior optical microscopes that can reveal the...
LED with Whiter Light Produced
Oct 1, 2007 — An LED that generates pure white light could someday replace the conventional lighting sources that are found today in homes and offices around the world. But first the device must be built. Researchers from the Indian Institute of Science in...
LEDs in High-Definition Television
Oct 1, 2007 — Recent improvements in light output have enabled new applications for LEDs such as automotive lighting, traffic signals and, more recently, television displays. Improvements in manufacturing the epitaxial material and packaging have enhanced thermal...
Patterning Technologies for Gen-10 Thin-Film Transistor LCD Manufacturing
Oct 1, 2007 — Used in almost every imaginable electronic display application, thin-film transistor LCD modules will generate more than $80 billion of revenue in 2007. Much of the LCD market growth is being driven by flat panels replacing CRT televisions. In 2002,...
Getting a Better View from Above
Oct 1, 2007 — If events go as planned, by mid-October a new eye in the sky will be beaming down views of the Earth that are more accurate than ever. In addition, a new generation of mapping and remote sensing satellites will carry the latest imagers. Thanks to...
Carbon Dioxide Lasers: Still the Most Successful in Industrial Applications
Oct 1, 2007 — The success of any laser in industrial applications depends on how well it can produce economically positive results for its owner. Despite recent innovations such as disc and fiber lasers, the CO2 laser — which has been around for nearly half a...
Manufacturing Microelectronics Using ‘Lase-and-Place’
Oct 1, 2007 — Microelectronic circuits traditionally are fabricated by placing packaged components, such as integrated circuits and surface-mount devices, on the surface of a circuit board and connecting the components together. As the demand for miniaturization...
Photonics with a French Twist
Oct 1, 2007 — An official competitiveness cluster since 2005, the Route des Lasers (or Laser Highway) operates similarly to a trade association. Located in the Aquitaine region of France, stretching from the city of Bordeaux to the Arcachon basin on the Atlantic...
Laser Safety and the Optical Table
Oct 1, 2007 — Optical tables and your bed at home have several things in common. You spend a great deal of time with both. In addition, just like your bed, many things find their home on or underneath your optical table. What does an optical table have to do...
Low-Temperature Flexible Sensors Use Ink-Jet Patterning
Oct 1, 2007 — Flexible electronics are used in supermarket labeling and in identification tags and could be used in large sensors for scanning cargo or packaging. As flexible electronics find their way into new applications, manufacturers are faced with problems...
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