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(38,334 articles)
Popular News
Fiber Ring Laser Is Wavelength-Switchable Around 1.5 µm
Aug 1, 2005 — Multiwavelength lasers are useful for interrogating fiber optic sensors and for testing fiber telecommunications systems, and some day could even serve as telecom transmitters. It sometimes is useful for the laser to produce many wavelengths simultaneously, but a laser capable of switching among its wavelengths, producing only one at a time, can readily find many applications. Erbium-doped fiber often serves as the gain medium for multiwavelength lasers because it provides the broad,...
Surface Plasmons Enable Subwavelength Lithography
Aug 1, 2005 — A pair of researchers at the University of Texas at Austin have found that the way to subwavelength nanoscale photolithography is only skin -- or surface -- deep. They used surface-plasmon-assisted photolithography with polarized 355-nm laser...
Thermal Compensator Polarizes Nd:YAG Laser
Aug 1, 2005 — Most of today's conference presentations and journal articles dealing with solid-state lasers are concerned with exciting new technologies such as fiber lasers, photonic crystals and thin-disk lasers. But out in the global marketplace, the...
Nanoscale Structures Route Light
Aug 1, 2005 — In a development with promise for the realization of nanoscale integrated photonic systems, investigators have routed and sensed light using nanowires and nanoribbons. A team from the University of California, Berkeley, Lawrence Berkeley National...
Textile Marker Approaching Commercial Reality
Aug 1, 2005 — Scientists at Oak Ridge National Laboratory in Tennessee are confident that a textile marking system that they developed with funding from the Small Business Administration not only will help to identify illegally imported goods, but also will...
Optoelectronic Tweezers Manipulate Microparticles
Aug 1, 2005 — In the July 21 issue of Nature, researchers from the University of California, Berkeley, report the development of a novel technique for the manipulation of microscopic objects by electrokinetic forces using a photoconductive sample cell. The...
White-Light Interferometry Exhibits Error
Aug 1, 2005 — A research team at the National Institute of Standards and Technology in Gaithersburg, Md., has determined that measurements of surface roughness taken using white-light interferometry can differ substantially from those taken using phase-shifting...
Two Imaging Elements Create One Multipattern Mask
Aug 1, 2005 — Inspired by a species of thousand-eyed, ocean-dwelling brittle star, investigators at the University of Pennsylvania in Philadelphia, Massachusetts Institute of Technology in Cambridge and Bell Labs in Murray Hill, N.J., have demonstrated that two...
Measuring Microholes by Measuring Shadows
Aug 1, 2005 — Measuring microscopic holes may benefit from a light touch, according to researchers from the National Institutes of Standards and Technology (NIST) in Gaithersburg, Md., and the University of North Carolina at Charlotte. They have devised a method...
Ultrathick Nanostructured Diamond Films Produced
Aug 1, 2005 — Diamond films are attractive for use as optical windows and in other applications requiring strength, transparency and chemical stability. In particular, nanocrystalline diamond films are smooth and can be electrically conductive -- attributes that...
Optical Data Stored on Fingernail
Aug 1, 2005 — Researchers at the University of Tokushima and at Hokkaido University in Sapporo, both in Japan, have used human fingernails as a medium for three-dimensional optical data storage. Employing a femtosecond laser to write and a fluorescence microscope...
InAs/GaSb Superlattice Photodiode Offers Uncooled Mid-IR Operation
Aug 1, 2005 — Scientists from Northwestern University in Evanston, Ill., the Missile Defense Agency in Washington and the US Air Force Research Laboratory at Kirtland Air Force Base in New Mexico have reported the development of mid-infrared photodiodes that are...
Daily News Briefs
Aug 1, 2005 — Presstek Inc., a manufacturer of high-tech digital imaging solutions for the graphic arts and laser imaging markets, has announced that its Lasertel division has formed an alliance to provide laser diode components and assemblies to Selex Sensors...
Packaging Advances High-Power White LEDs
Aug 1, 2005 — High-power white LEDs are in high demand for automotive use and are a potential replacement for the incandescent lightbulb. But problems with size, heat dissipation and efficiency have taken researchers back to the drawing board to come up with new...
Material May Enable Single-Source White LEDs
Aug 1, 2005 — White LEDs are commonly made by mixing blue light from an LED chip with yellow light from a stimulated YAG phosphor. This approach works, but just a single source would streamline the process. Researchers in a team at National Tsing Hua University...
Multicolor LEDs Get a Boost from Quantum Dots
Aug 1, 2005 — Much attention in research communities is focused on generating light using semiconductor nanocrystals, also known as quantum dots. One benefit of this method is that emission color can be controlled simply by changing the size of the dots. An...
Optical Microscopy Reveals Benefits of Strain for Spintronics
Aug 1, 2005 — In experiments at Los Alamos National Laboratory in New Mexico, Scott A. Crooker and Darryl L.G. Smith have demonstrated that strain can be used to control the spin of electrons flowing in bulk GaAs. They monitored the effects of applied electrical,...
Laser Enables Resolution of Nanomagnet Flipping
Aug 1, 2005 — At the University of California, Santa Cruz, researchers have demonstrated an optical method to watch nanomagnets flip. Optically tracking changes in the magnetization of the nanostructures could pay off in various ways, explained assistant...
Optically Active Quantum Dots Embedded in Nanowires
Aug 1, 2005 — Investigators at the Swiss Federal Institute of Technology in Zurich have reported the fabrication of quantum dots in nanowires that display a level of brightness an order of magnitude higher than self-assembled InAs dots. They suggest that the work...
PHOTONIC COMPONENTS
Aug 1, 2005 — Melles Griot has released “Catalog X,” the 10th volume in its series of photonic product and technology guides. Titled “The Practical Application of Light,” the 1148-page publication presents more than 25,000 parts. Among 1100 new items are...
MOTION CONTROL
Aug 1, 2005 — Titled “The World of Nano- and Micropositioning,” the 2005 supplement catalog from PI (Physik Instrumente) LP features a wide variety of precision motion control products, including piezomotor controllers, compact scanning stages for imaging...
FLUORESCENCE ESSAYS
Aug 1, 2005 — The second volume in a book serial, Reviews in Fluorescence 2005 is acollection of analytical essays covering the year’s progress in the field, including trends and emerging areas. Written by experts, the reviews are geared toward academics, bench...
OPTICAL FILTERS
Aug 1, 2005 — From Semrock Inc. is the 2005 catalog titled “The Standard in Optical Filters for Biotech & Analytical Instrumentation.” Along with tutorials and technical notes, the 28-page, full-color catalog specifies the BrightLine filters for fluorescence...
METROLOGY SUPPLIES
Aug 1, 2005 — A redesigned Web site showcases Armstrong Optical Ltd.’s new items, such as the MobIR M4 handheld thermal/visible imaging systems with full thermographic capability; the Ross multichannel, self-calibrating streak camera; and a wide range of...
FILTER SHIELDING
Aug 1, 2005 — The “Engineering Design Guide” from Silver Cloud Manufacturing Co. offers detailed information on electromagnetic and radio-frequency interference shielding for Duralan II filters and windows. It was developed to provide engineers and designers with...
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August 2024
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