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(9,094 items)
Research & Technology News
Nanostructured Material Exhibits Negative Refractive Index in the Visible
Jan 1, 2006 — A team of investigators at the University of Manchester in the UK, the Institute of Microelectronics Technology in Chernogolovka, Russia, and Aston University in Birmingham, UK, has reported a real part of the refractive index of −0.7 at visible frequencies of 700 THz in an array of gold nanopillars on glass. The scientists hope to develop a three-dimensional design for a lens made of the material that would produce perfect images with subwavelength accuracy. Nearly 40 years ago,...
Novel Camera Employs Microlenses
Jan 1, 2006 — Researchers at Stanford University in California have found that one lens may be good but that thousands of lenses are better for taking pictures. The group at Pat Hanrahan’s lab has developed and field-tested under a variety of conditions a...
Photonic Crystal Array Lases at Stanford
Jan 1, 2006 — Lasers based on nanocavities in photonic crystals have been widely investigated because of the high density of states associated with these tiny devices, which leads to low lasing thresholds and to high direct-modulation rates. But their drawback to...
Photonic Rubber Sheet Displays Tunable Structural Color
Jan 1, 2006 — An elastic photonic crystal developed by scientists at the National Institute for Materials Science in Tsukuba, Japan, demonstrates a shift in its apparent color under an applied strain, suggesting its utility in strain imaging and mechanical...
Self-Assembled Nanoprisms Form Smectic Crystal
Jan 1, 2006 — Building nanometer-scale devices such as photonic crystals requires assembly techniques of unprecedented accuracy. Developing these techniques can be as difficult as designing the devices and, thus, self-assembly methods — in which the components of...
Sensitive Intrusion Detector Relies on Fiber Optic Reflectometer
Jan 1, 2006 — Optical time-domain reflectometry (OTDR) is a well-established technique for detecting faults and discontinuities in long stretches of optical fiber. A short optical pulse is injected into one end of the fiber, and as it travels along the fiber’s...
Silicon Laser Relies on Quantum Wells
Jan 1, 2006 — Silicon-based lasers have been much in the news recently, as some researchers have explored Raman lasers in silicon, while others have pursued doping or the introduction of a lasing element into silicon. These developments hold the promise of...
Simple Technique Tunes a Fiber Lasers Wavelength
Jan 1, 2006 — The broad spectral linewidths of fiber lasers make them attractive candidates for versatile, wavelength-tunable sources, but the wavelength-tuning mechanisms — often involving multimode fiber Bragg gratings or other complex components — are neither...
Software Fills the Blanks in Imagery
Jan 1, 2006 — As satellite-borne sensors have become more sophisticated, a wealth of data has become available to Earth scientists. Unfortunately, the level of detail these sensors afford carries a downside: It has become much more difficult and computationally...
Three-Color Ink Proposed for Electronic Paper
Jan 1, 2006 — The low cost and low power requirements of electronic paper displays promise to make them suitable for applications from variable price tags to wearable health monitors. But for the technology to fully realize this potential, the electronic ink...
Tunable Slow Light Achieved in Silicon Photonic Crystal
Jan 1, 2006 — Scientists at IBM’s T.J. Watson Research Center in Yorktown Heights, N.Y., have carefully measured the slowing of light in a silicon photonic crystal and have demonstrated that the amount of slowing can be controlled by heating the crystal. Slow...
Customized Microscope Helps Track Cells
Dec 28, 2005 — BERKELEY, Calif., Dec. 28 -- Researchers from the University of California at Berkeley using a customized atomic force microscope (AFM) have discovered new evidence for how the fibrous scaffolding within human cells responds to obstacles in its...
Semiconductor Consortium Funds Nanoelectronics Research Centers, Grants
Dec 8, 2005 — RESEARCH TRIANGLE PARK, N.C., Dec. 8 -- Seeking to accelerate nanoelectronics research at US universities to benefit the long-term needs of the semiconductor industry, a consortium of companies known as the Nanoelectronics Research Corp. (NERC)...
European Technology Platform Launched for Photonics
Dec 2, 2005 — BRUSSELS, Belgium, Dec. 2 -- More than 200 photonics industry representatives, researchers and policymakers from 16 European member states and 120 companies celebrated the launching of the European Technology Platform (ETP) Photonics21 in Brussels...
Photonics Platform Launched in Europe
Dec 2, 2005 — BRUSSELS, Belgium, Dec. 2 -- More than 200 photonics industry representatives, researchers and policymakers from 16 European member states and 120 companies celebrated the launching of the European Technology Platform (ETP) Photonics21 in Brussels...
Cone-Shaped Brewster Surface Produces Radially Polarized Beam
Dec 1, 2005 — Radially polarized laser beams — in which the electric-field vector is always oriented in the radial direction — may be advantageous for the optical trapping and manipulation of small particles. Although many techniques for generating radially...
Fiber Laser Generates 1.6 W in Single Longitudinal Mode
Dec 1, 2005 — Researchers at the University of Arizona’s College of Optical Sciences in Tucson have generated 1.6 W at 1550 nm in a single longitudinal mode from a short, cladding-pumped Er:Yb codoped fiber laser. They believe that theirs is among the...
Maskless Photolithography May Offer Cost Advantage
Dec 1, 2005 — Conventional lithography achieves sub-100-nm features by using short-wavelength light, immersion technology and optical enhancements such as phase-shift masks. But the dramatically increasing cost of the latter makes alternative, maskless...
More Bandwidth from Molecules of Light
Dec 1, 2005 — At Universität Rostock in Germany, researchers may have found a way to squeeze more bandwidth out of today’s telecommunications infrastructure. They have demonstrated the existence of molecules of temporal solitons, or permanent solitary waves. Such...
Multimode Fiber Thinks Its Single-Mode
Dec 1, 2005 — In an unusual intersection of fiber optics and astronomy, a collaboration of British and Australian scientists has yielded a technique that they believe could revolutionize ground-based infrared astronomy. Bright and narrow spectral lines from...
Near-Field Solid-Immersion Mirror Records Data Optically
Dec 1, 2005 — Investigators at Seagate Technology’s research laboratory in Pittsburgh have demonstrated a near-field planar solid-immersion mirror that could usher in higher optical data storage densities than what magnetic media offer. The approach offers...
New Project Aims to Coordinate Research
Dec 1, 2005 — Merging Optics and Nanotechnologies is a project begun by the European Commission to maintain Europe’s competitiveness in the photonics and nanotechnology markets by increasing collaboration among researchers. MONA, as the project is called, has...
Optical Switch in Silicon Relies on Photonic Crystal
Dec 1, 2005 — All-optical switching — in which light in a “control” beam switches light in a “signal” beam on or off — is the fundamental building block of such cutting-edge photonics technologies as telecommunications and optical computing. Moreover, optical...
Photonics Examines Pharmaceuticals at Environmental Interfaces
Dec 1, 2005 — With the increased use of antibiotics, hormones, herbicides and pesticides in agriculture, the environmental effects of these substances have become a concern. The discharge of veterinary antibiotics can lead to drug resistance in target microbes,...
Silica Nanotubes Loaded with Laser Dyes
Dec 1, 2005 — A team of scientists in South Korea has used a sol-gel process to fabricate color-tunable silica nanotubes that incorporate functional laser dyes. The investigators suggest that the one-dimensional structures may form the basis of new nanoscale...
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