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(38,336 articles)
Popular News
Thermoreflectance Spots Hot and Cold Sites on Integrated Circuit
Apr 1, 2006 — When it comes to integrated circuit failure analysis, Caesar Saloma of the National Institute of Physics at the University of the Philippines in Quezon City doesn’t blow hot and cold. He’s counting on the circuits to do that. Saloma, a professor of physics and director of the institute, is working to improve optical techniques for failure analysis. He hopes to use these approaches to identify likely breakdown locations in prototype circuits that cause transistors to run hot from too much...
Alternative Studied for Sensitizing TiO
2
to Visible Light
Apr 1, 2006 — To truly enable a transition to a global industrial system based on hydrogen rather than on fossil fuels will require the development of an efficient and environmentally friendly means of extracting hydrogen from feedstocks such as water. One...
Nanorods Form Thin Films with Ultralow Refractive Index
Apr 1, 2006 — Devices based on interference from alternating layers of high- and low-index materials are ubiquitous in today’s photonics technology. Laser mirrors, antireflection coatings, fiber Bragg gratings and photonic bandgap fibers all employ the same basic...
Fiber Preforms Fabricated by ‘Core Suction’
Apr 1, 2006 — Adding to the variety of techniques for fabrication of optical fibers, scientists at Virginia Polytechnic Institute and State University in Blacksburg and at Fisk University in Nashville, Tenn., have developed a method they call “core suction.” The...
Erbium Host Offers High Doping Levels, Flat Gain
Apr 1, 2006 — Researchers at the Universities of Nottingham and Sheffield in the UK and at Universidad de La Laguna on the island of Tenerife in Spain are investigating a new class of material as an erbium host for telecommunications applications. The material,...
Leave the Driving to Us
Apr 1, 2006 — After more than 130 miles across dry lake beds, along winding mountain paths and through the rocky wilderness, Stanley emerged from the Mojave Desert to cross the finish line. Beyond the sweetness of a first-place finish with its $2 million prize,...
Photonics Improves Sky Gazing
Apr 1, 2006 — They may not physically go — boldly or otherwise — where no one has gone before, but astronomers often see what no one has seen before. Thanks to photonic innovations and techniques, the ability to uncover the secrets of the cosmos continues to...
Sensing Trace Gases with Quantum Cascade Lasers
Apr 1, 2006 — Trace-gas sensing is a rapidly developing field, in demand for applications such as breath diagnostics, process and air-quality monitoring, atmospheric measurements, and security and surveillance. Quantum cascade lasers have dramatically affected...
Drift in Cryogenically Cooled Photodetectors: Causes and Cures
Apr 1, 2006 — Infrared photodetectors benefit greatly from cooling to cryogenic temperatures. For this reason, manufacturers mount the majority of these instruments in evacuated Dewars that use cryogenic coolants such as liquid nitrogen or helium (Figure 1)....
Optical Lattice Clock Employs Ytterbium-174
Apr 1, 2006 — An optical lattice atomic clock built by a collaboration of researchers from the National Institute of Standards and Technology in Boulder, Colo., and from the Siberian branch of the Russian Academy of Science’s Institute of Laser Physics in...
Elastic Photonic Crystal Captures Fingerprints
Apr 1, 2006 — Rubbery inverse opal films that change color under pressure promise diverse applications from biometrics and mechanical sensing to children’s toys and tamperproof packaging. Developed by researchers at the University of Toronto and at the European...
Light-Driven Molecule Moves Microscale Objects
Apr 1, 2006 — Chemists at Rijksuniversiteit Groningen and Technische Universiteit Eindhoven, both in the Netherlands, have designed and synthesized a helical molecule that rotates when exposed to ultraviolet radiation and heat, carrying along with it objects tens...
Electronic Properties of Single Silver Nanoparticles Are Studied
Apr 1, 2006 — Metallic nanoparticles display potential for such applications as enhancing the fluorescence of biological molecules, but for all the interest, significant questions regarding their properties remain. The electronic properties that affect the...
Tandem White-Light Organic LED Displays Gains in Luminance Efficiency
Apr 1, 2006 — Exploring ways to produce white light from organic LEDs (OLEDs), researchers at National Chiao Tung University in Hsinchu, Taiwan, have found that stacking two emitters can yield a device with three times the luminance efficiency of a single unit....
Low-Refractive-Index Nanorod Layer Improves LED Extraction Efficiency
Apr 1, 2006 — The development of GaN-based LEDs has pushed the emission of these solid-state sources into the blue and ultraviolet and has enabled the production of white-light LEDs, promising benefits in terms of device lifetime and energy usage. For white-light...
ZnO-Based Blue-Violet LEDs Fabricated on Sapphire
Apr 1, 2006 — inc oxide has been investigated as a green fluorescent material for many years. Now researchers are looking at it for use in UV and blue emitters. It offers thermal stability and resists chemical attack and oxidation, and its exciton binding energy...
Photopatterning Demonstrated for Nanocrystal-Based LEDs
Apr 1, 2006 — Semiconductor nanocrystals have received attention for their potential in LEDs. Researchers have explored a variety of novel approaches for the assembly of the nanomaterials into a device structure. Now a group from Samsung Advanced Institute of...
Flexible Organic LED Has Flexible Uses
Apr 1, 2006 — Researchers at Princeton University and at Universal Display Corp. in Ewing, both in New Jersey, have constructed an organic LED (OLED) on a flat 9.5 × 9.5-cm sheet of plastic and deformed it into a dome with a radius of 8.5 cm. The device continued...
Micromembrane Probe Improves Atomic Force Microscopy
Apr 1, 2006 — A significant advance in atomic force microscopy (AFM) is at hand, thanks to a new type of probe that enables the acquisition of data on dynamic molecular interactions and the simultaneous collection of information about various material and surface...
Chaos Affects Atomic Force Microscopes
Apr 1, 2006 — A pair of researchers at Purdue University in West Lafayette, Ind., have confirmed suspicions that deterministic chaos plays a role in dynamic atomic force microscopy (AFM) systems, introducing small but real uncertainty into the measurements....
Laser Scanning Microscopy Images Microjets Impinging Electrodes
Apr 1, 2006 — To enable the creation of better models of electrochemical interactions, Patrick R. Unwin and colleagues at University of Warwick in Coventry, UK, are investigating novel microjet geometries that project a stream of solution against an electrode,...
Fluorescence Microscopy Probes Surface-Dependent Catalysis
Apr 1, 2006 — As the chemical industry develops techniques that use crystal surfaces to catalyze reactions to improve production efficiency, there is an interest in better understanding the process. Many analytical approaches involve single-crystal metal surfaces...
LASER SAFETY
Apr 1, 2006 — A supplier of laser safety products, particularly eyewear, LaserVision GmbH has released its Edition 18 catalog. The document includes introductory sections on the laser, electromagnetic radiation and laser safety regulations in the US and Europe....
OPTICS SOURCING
Apr 1, 2006 — IVO Associates, a business development consulting firm, has launched a Web site for its optics sales business, Optics-Solutions. It separated the business from its consulting arm to provide a dedicated optics sourcing channel for customers. Managed...
POSITIONING EQUIPMENT
Apr 1, 2006 — PI (Physik Instrumente) GmbH & Co. KG has launched a Web site redesigned to help users view and download information on its products, including motor controllers, piezo motion controllers, piezo linear motors and actuators, motorized stages and...
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August 2024
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