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(38,338 articles)
Popular News
Sorting Atoms for Quantum Computing
Sep 1, 2006 — Strings of laser-trapped atoms can be useful for storing and processing quantum information. Recently, researchers at the University of Bonn in Germany used an optical trapping technique to rearrange atoms in such strings with submicrometer precision to change their order. In this fluorescent image of strings, up to seven ultracold cesium atoms are shown trapped in the intensity maxima of a standing-wave laser beam. The strings have been made equidistant by rearranging the positions and...
VECSEL Generates Watt-Level Blue-Green Output
Sep 1, 2006 — Compact and efficient blue-green lasers have numerous potential uses, including in displays, data storage, spectroscopy and biomedical applications. Recently, a collaboration of researchers at the University of Arizona and at Areté Associates, both...
Mirrors play key role in terahertz communications
Sep 1, 2006 — The potential of terahertz technology in communications applications is contingent upon the development of essential devices — such as sources and detectors — and supplementary components — such as filters, modulators and mirrors. Because of the...
Making Fluorescence Correlation Spectroscopy Flexible
Sep 1, 2006 — Fluorescence correlation spectroscopy helps to shed light on the behavior of molecules in aqueous solutions by measuring fluctuations in fluorescence intensity. Typically, data is collected from a single, fixed-focus position within the sample....
Bright LEDs Made on Side Facets of GaN Stripes
Sep 1, 2006 — LEDs are fabricated by growing epitaxial layers along the direction of the crystal polar axis. However, the optical efficiency of these optoelectronic devices decreases with increasing wavelength, due in part to strong internal piezoelectric fields...
Circular Bragg Grating Boosts LED Output
Sep 1, 2006 — A team of scientists at the National Institute of Standards and Technology in Boulder, Colo., has demonstrated that etching a circular Bragg grating into the surface of a semiconductor LED increases light extraction sevenfold. Such structures are of...
Lensless X-ray Microscopy Images Nanocrystals
Sep 1, 2006 — Scientists at the University of Illinois in Urbana have used coherent hard x-rays to produce 3-D images of 750-nm lead nanocrystals with a spatial resolution of 40 nm. With improved detectors and more powerful sources of coherent x-rays, they...
Images Reveal Shape, Orientation of Nanoparticles
Sep 1, 2006 — Using a variant of confocal microscopy that illuminates samples with higher-order laser modes, investigators at Universität Tübingen in Germany have produced images of gold nanospheres and nanorods that offer information about both the shape and the...
Plasma Deposition Yields Thin Films of Optically Active Dyes
Sep 1, 2006 — Scientists in Europe have reported the development of a single-step, room-temperature plasma-enhanced chemical vapor deposition process that yields polymeric thin films incorporating isolated rhodamine molecules. They note that the method is...
Suspended Nanotubes Imaged by Photoluminescence
Sep 1, 2006 — The luminescent response of optically pumped single-walled carbon nanotubes may be used to create images of the structures, report scientists from the Institute for Microstructural Sciences in Ottawa and from the University of Ottawa. Employed as a...
Enabling Subcellular pH Sensing
Sep 1, 2006 — A team of scientists at Rice University in Houston has reported that gold nanoshells — structures on the order of 100 nm in diameter comprising a nonconducting core and an outer layer of gold — can be functionalized to yield surface-enhanced Raman...
Lasers Serve the Muse
Sep 1, 2006 — Paula Dawson, a pioneer and reknowned exponent of using holographic images as a fine art form, has been exhibiting laser-based works in galleries and museums worldwide since the late 1970s. Her triptych, Eidola Suite, an installation on view in the...
ARRAY SPECTROMETER
Sep 1, 2006 — A full-color brochure from Instrument Systems GmbH describes the CAS 140CT array spectrometer, including its back-illuminated CCDs and extended InGaAs detectors, which provide a spectral range from 200 to 2150 nm. Showing screen shots, it covers...
MALDI RECIPES
Sep 1, 2006 — Researchers at the National Institute of Standards and Technology (NIST) have added 150 methods to a database of 255 procedures for analyzing specific synthetic polymers using matrix-assisted laser desorption/ionization (MALDI) mass spectrometry....
ASTRONOMY FILTERS
Sep 1, 2006 — The brochure “Filters for Astronomy & Aerospace” from Omega Optical Inc. details the company’s Bessell photometric sets, which are polished to transmitted wavefront, wedge and flatness specifications, and its custom filters, which are available...
DIGITAL CAMERA SITE
Sep 1, 2006 — A redesigned Web site has been launched by Andor Technology plc, a supplier of digital cameras, spectrographs, microscopy systems, and related software and accessories. The portal offers an improved layout and navigational structure to facilitate...
PLATE READER
Sep 1, 2006 — Wyatt Technology Corp. has released a brochure titled “The DynaPro Plate Reader for Automated, High Throughput Dynamic Light Scattering.” Available in hard copy or pdf, the publication describes the company’s dynamic light scattering system, which...
LEAK DETECTION
Sep 1, 2006 — An eight-page capabilities brochure from Vacuum Instrument Corp. titled “VIC Leak Detection” describes the company’s expertise in the technology, which includes air leak testing, industrial leak detection and advanced leak metrology. A list of...
SPATIAL FILTERS
Sep 1, 2006 — Melles Griot has added a full line of apertures, spatial filters and microscope components to its online catalog. Visitors to its Web site will find specifications on reticles, resolution test targets and focusing microscope bodies, which accept...
ENDOSCOPES
Sep 1, 2006 — An electronic brochure from Moritex Corp. describes the company’s LightScope, fiberscope and borescope industrial endoscopes for testing and visual inspection of automobiles, industrial machinery, petrochemical plants, gas, air- and spacecraft and...
LASER RELIABILITY
Sep 1, 2006 — Version 2.01 of the Microsoft Excel-based “Laser Reliability Workbook” has been released by ILX Lightwave Corp. The downloadable tool is used to analyze and plot laser diode and LED lifetime data. Up to 100 lifetime data points may be entered into...
LASER IMAGING
Sep 1, 2006 — DataLase has published a brochure on its Casemark process, which is an alternative to print-and-apply labels targeted to sectors that require printing variable information on outer case secondary packaging. The noncontact imaging technique...
OPTICAL BEAM SITE
Sep 1, 2006 — Owis GmbH, a supplier of optical beam-handling and -positioning systems, has launched an enhanced Web site with a layout and menu structure designed to provide rapid access to product information. It includes a contact form for customers to request...
OPTICAL WAVEGUIDES
Sep 1, 2006 — For researchers, professionals and students involved in optics and communications engineering, the second edition of Fundamentals of Optical Waveguides emphasizes optical theory, including coupled-mode theory, nonlinear optical effects, and finite...
Formulating Lenses that Focus on Their Own
Sep 1, 2006 — Researchers at the University of Wisconsin-Madison have devised some smart microlenses that change optical properties, such as focal length, on their own in response to varying environmental conditions. The devices, either singly or in arrays,...
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August 2024
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