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(38,092 articles)
Popular News
Photodetector Operates to ~200 nm
Feb 1, 2008 — In semiconductor manufacturing, what is small today will seem large tomorrow, which is true as much for the wavelengths required to make the chips as it is for the devices themselves. Chip makers currently need photodetectors that sense radiation at ∼200 nm — the wavelength of light sources that are used in state-of-the-art photolithography techniques. However, they soon will require photodetectors for extreme-UV (∼13 nm). Now, investigators from Kansas State University in...
Q: What Did the Scientist Say to the LED? A: Don’t Be Square
Feb 1, 2008 — A major issue with gallium-nitride LEDs is that, although they efficiently generate short-wavelength photons, the high refractive index of GaN (n = 2.5) traps much of the light inside the semiconductor chip as a result of total internal reflection....
Tracing Environmental Change via Scallops
Feb 1, 2008 — “You are what you eat” is true not just for people — it also works for scallops, members of the large family of marine bivalve mollusks. Scallops are a potential treasure trove for environmental scientists because their shells are grown layer by...
Visualizing Flow in Three Dimensions Three Ways
Feb 1, 2008 — For designers of chemical processing equipment, scaling up from prototype to production is difficult because some mechanical characteristics vary greatly when you change their size. For example, mechanical extractors used to mix and separate fluids...
Lighting Competition
Feb 1, 2008 — The 2008 “Lighting for Tomorrow” competition, organized by the American Lighting Association, the US Department of Energy and the Consortium for Energy Efficiency, recently was announced. This year’s competition is inviting solid-state lighting...
Rofin-Sinar to Acquire Nufern
Feb 1, 2008 — Rofin-Sinar Technologies Inc. of Plymouth, Mich., a developer and manufacturer of laser beam sources and laser-based solutions, has signed an agreement for the acquisition of Nufern of East Granby, Conn., for an undisclosed amount. The latter, a...
OSA Offers Scholarship Program
Feb 1, 2008 — The Optical Society of America (OSA) Foundation in Washington, which supports programs that advance youth science and optics education, has partnered with the Harvey M. Pollicove Memorial Fund of Rochester, N.Y. They will offer the $4000 Harvey M....
Big Sky Laser Changes Name
Feb 1, 2008 — Big Sky Laser Technologies Inc. of Bozeman, Mont., a solid-state laser manufacturer, will change its name to Quantel USA Inc. The company has been a 100 percent subsidiary of Quantel of Les Ulis, France, since 1998. It will continue to design and...
Intel Sells Division for $85 Million
Feb 1, 2008 — Emcore Corp. of Santa Clara, Calif., will purchase the telecommunications-related section of the optical platform division of Intel Corp. of Albuquerque, N.M., for $85 million. The former will acquire intellectual property and technology relating to...
Sunny Future Forecast for Solar Technology
Feb 1, 2008 — The next several years look bright for the photovoltaic industry as the demand for alternative energy grows and improvements to existing technology make solar power a more viable option for consumers. A market report published in December by BCC...
Intense Enters Chinese Market
Feb 1, 2008 — A&P Instrument Co. Ltd. of Hong Kong has signed an agreement with Intense Ltd. of Glasgow, UK, to distribute that company’s entire line of high-power, quantum well intermixing enabled laser diodes to manufacturers in China. Products to be...
Optofluidics Emerges from the Laboratory
Feb 1, 2008 — For centuries, the components in optical systems have been made from a variety of glasses and metals. More recently, however, they have been created from plastic and semiconductor materials. In other words, optical materials in general are solid in...
Tiny Mach-Zehnder Modulator Operates at 10 Gb/s
Feb 1, 2008 — Silicon photonics offers the potential of combining the speed and compactness of photonics with the functionality and CMOS fabrication of electronics, a happy combination that may result in vastly more capable computers, communications and consumer...
Microring Modulator Points to Greater Integration of Electronics and Photonics
Feb 1, 2008 — Although the Mach-Zehnder modulator in the previous report boasts a tiny footprint and avoids the necessity of delicately balancing environmental parameters to maintain a resonance, it requires a hefty, multivolt drive signal that cannot easily be...
Plastic NIR Photodetector Created with Low Bandgap Polymer
Feb 1, 2008 — Although inorganic photodetectors are finding their way into myriad applications, relatively little has been done with their close cousins, polymer-based near-infrared sensors. Despite a range of potentially valuable uses, such as chemical and...
Yb-Fiber Laser Is Efficiently Pumped at an Oblique Angle
Feb 1, 2008 — Fiber lasers can be optically pumped by coupling the pump light directly into the fiber core, but because the acceptance angle of the core is relatively narrow, core pumping requires a high-quality — low divergence — pump beam (Figure 1a). Because...
A Viable Commercial Alternative to the Ti:Sapphire Laser?
Feb 1, 2008 — The venerable Ti:sapphire laser has always been the workhorse of ultrafast technology, but it is an expensive beast, partly because it requires expensive green pump lasers. Cr3+-doped colquiriites (Cr:LiSAF, Cr:LiSGaF and Cr:LiCAF) also can be...
VECSEL and Its Pump Laser Monolithically Integrated
Feb 1, 2008 — Compact and efficient green lasers have multiple applications, from laser-projection systems to the fabrication of solar cells and flat-screen displays. Because there are no lasers that emit efficiently in the green spectral region, frequency...
Quantum Systems Directly Probed by Photons
Feb 1, 2008 — Microcavity systems that track and measure the quantum interactions that occur between light and matter have been devised by two research teams in California. Although cavity quantum electrodynamic systems come in a variety of configurations,...
Ultrafast Electron Microscopy Reveals Laser Control of Nanochannels
Feb 1, 2008 — Scientists are interested in optoelectronics applications, such as optical memory storage, and in molecular machines that mimic biological molecules, which usually exhibit precision superior to that of man-made devices. These diverse fields may...
Gaining High Resolution with Nanoaperture Grid
Feb 1, 2008 — Researchers at California Institute of Technology in Pasadena have demonstrated a subwavelength-resolution microscopy technique that uses a two-dimensional grid of tiny holes to increase resolution in a manner similar to that of a near-field...
This Pen Is a Real Pal
Feb 1, 2008 — Will the venerable ballpoint pen be going the way of the quill and inkwell? The Livescribe smartpen, slated for commercial release early this year, boasts capabilities that even the most stylish writing implement from Montblanc could never hope...
Ancient Mummies Tell Hair-Raising Tale
Feb 1, 2008 — About 9000 years ago, a group of people living in South America, near what is now the border between Chile and Peru, lived mainly by fishing. Many of them — including an unusually high number of babies and fetuses — died mysteriously. We know...
LASER DIODE GUIDE
Feb 1, 2008 — Part of the “How to Select” series, the “Guide to Custom High Power Laser Diodes” from Intense Ltd. is targeted to design engineers. The 10-page downloadable document includes guidelines for laser diode specifications, including a flow chart to help...
CAMERA PHONES
Feb 1, 2008 — The International Imaging Industry Association has published the “CPIQ Initiative Phase 1 White Paper: Fundamentals and Review of Considered Test Methods,” which addresses camera phone image quality. Downloadable from the company Web site, the...
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