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Research & Technology News
Diffractive Fluorescence Multiplex Assay
Apr 1, 2008 — A 14-member team from the University of Southampton and from the Rutherford Appleton Laboratory in Didcot, both in the UK, has combined microscopic bar codes and fluorescent biomolecules in a rapid, noninvasive assay with high encoding capacity. The technique could be useful for immunodiagnostics and single nucleotide polymorphism genotyping. The serrated-edge micro bar-code particle diffracts the laser beam, and a CCD camera captures and analyses the diffraction pattern and reads the code....
Interferometer Investigates MEMS Vibrations
Apr 1, 2008 — Two scientists from Helsinki University of Technology in Finland have developed an instrument that probes surface vibrations of frequencies up to 6 GHz, detecting amplitudes down to 1 pm with a lateral resolution better than 1 μm. It measures...
Large Binocular Telescope Captures First Light Images
Apr 1, 2008 — A giant telescope that resembles a pair of binoculars is up and running atop Mount Graham in Graham County, Ariz., peering into a galaxy some 102 million light-years away from the Milky Way. With its twin side-by-side mirrors measuring 27.6 ft in...
Making a Microlens Array with Micromirrors
Apr 1, 2008 — The best way to make a microlens may be to use a micromirror, according to researchers from the University of Texas at Austin. Associate professor Shaochen Chen and graduate student Yi Lu used a commercial digital micromirror device as a dynamic...
Microscopic Flow of Non-Brownian Systems Probed
Apr 1, 2008 — Understanding the microscopic dynamics that occur between a flowing fluid and an elastic solid, such as those that happen in plastics manufacturing and in numerous other industrial applications, can be an important parameter in quality...
NIR Spectroscopy Monitors Wood
Apr 1, 2008 — A team from the Competence Centre for Wood Composites and Wood Chemistry in Linz and from the University of Natural Resources and Applied Life Sciences Vienna, both in Austria, and from Technical University of Munich, has shown that near-infrared...
Photoacoustic Shear Waves in Gold Nanocrystals
Apr 1, 2008 — Scientists from Université du Mains in Le Mans and from Université de Caen, both in France, and from Massachusetts Institute of Technology in Cambridge, Mass., USA, have generated and detected picosecond acoustic shear waves in gold films. The...
Plant Leaves Reveal Clues About Crop Health
Apr 1, 2008 — For many farmers, the possibility of crop failure from diseases such as root rot is an ever-present worry. The anxiety is compounded by the fact that, by the time corn, potatoes, cotton and other mainstay crops start to exhibit the tell-tale...
Putting Optical Communications in the Black
Apr 1, 2008 — The computers in an office someday might be networked with light, if recent research on black silicon pans out. A group of researchers from Harvard University in Cambridge, Mass., from Koç University in Istanbul, Turkey, and from SiOnyx Inc. in...
Silicon Raman Laser Cascades Toward Mid-IR Spectral Region
Apr 1, 2008 — The mid-IR spectral region, often defined as wavelengths between 2 and 5 μm, is important to spectroscopy because virtually all molecules have unique rotational-vibrational “fingerprints” in that region. However, building compact and efficient...
Super-Tiny Mach-Zehnders Assembled with Nanofibers
Apr 1, 2008 — Mach-Zehnder interferometers find application in fields ranging from telecommunications to medical diagnostics to spectroscopy. Investigators have constructed the devices using free-space mirrors, optical fibers, photonic crystals and microfluidic...
Visualizing a Laser’s Polarization
Apr 1, 2008 — One of the oldest tricks in the book is checking a laser beam’s polarization with a microscope slide: You stick the slide, oriented at Brewster’s angle, into the beam and then rotate it around the beam axis until the reflection disappears. The...
Adding Teeth to Spectroscopic Detection
Mar 1, 2008 — With conventional broadband spectroscopy techniques, detecting optical frequencies can be performed to a resolution of ~10 MHz. Now, however, researchers at the National Institute for Standards and Technology (NIST) in Boulder, Colo., have devised a...
Getting Semiconductors Ready to Take a Spin
Mar 1, 2008 — For semiconductors, the hope is that everything will not be just about electron charge in the future. Instead, having devices also exploit electron spin — resulting in new kinds of memory and logic chips — is a goal of spintronics, the spin-based...
Making Slow Light Go Slower
Mar 1, 2008 — A crucial part of optical signal processing is buffering and storage — sometimes a signal has to wait a while until the system is ready for it. Although this is readily accomplished electronically, it is more of a challenge optically. One approach...
Spectroscopy Can Help Bakers Make Bread
Mar 1, 2008 — When bread dough rises in a small amount of time, the yeast does not produce much carbon dioxide gas, resulting in bread that is too flat and too hard. Longer rise times, however, result in bread that is too fluffy. Bakers currently rely on personal...
Speedy and Colorful Terahertz Scanning
Mar 1, 2008 — When it comes to nondestructive screening and testing, terahertz time-domain spectroscopic imaging offers significant advantages but one considerable drawback. Lying between infrared and microwave wavelengths, terahertz waves can penetrate a wide...
Thermal Sensing with Short-Wave Infrared Detectors
Mar 1, 2008 — Because glass is not transparent at mid- and long-infrared wavelengths, it stops current thermal detectors cold. Consequently, regular glass lenses cannot be used for these thermal imagers, and thermal imagers cannot peer through the window of a...
White Light from a Near-UV Laser Diode
Mar 1, 2008 — Techniques for producing white light from LED methods vary, but most involve mixing blue LED light with yellow phosphor to achieve what the human eye perceives as white. However, the white light is not stable, and its luminous efficacy decreases as...
Optical Tech Topic of Talks
SAN DIEGO, Feb. 15, 2008 -- Getting the most out of limited wireless bandwidth, ratcheting up data rates, new routes on the information superhighway, and a new view of the electromagnetic spectrum are some of the topics that will be covered in research presentations during the...
Optical Tech Topic of Talks
SAN DIEGO, Feb. 15, 2008 -- Getting the most out of limited wireless bandwidth, ratcheting up data rates, new routes on the information superhighway, and a new view of the electromagnetic spectrum are some of the topics that will be covered in research presentations during the...
Pirelli Forms Photonics Group
MILAN, Italy, Feb. 4, 2008 -- The Pirelli Group announced it will form a new company by integrating the photonics work of its Broadband Solutions business with the photonics-related research and development activities of the optical innovation division of Pirelli Labs. The...
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...
LEDs Provide Stable Spectroscopic Light Sources
Feb 1, 2008 — To estimate the concentration of various species in plasmas, scientists frequently employ broadband absorption spectroscopy. The xenon arc or deuterium lamps used as light sources in the devices, however, display high spatial and spectral...
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...
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