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Research & Technology News
OSA Names Chief Scientist, Journal Editors
WASHINGTON, D.C., Jan. 9, 2016 — The Optical Society (OSA) has chosen a trio of researchers and an entrepreneur to lead three of its scholarly journals and its scientific endeavors. Alexandra Boltasseva, appointed editor-in-chief of Optical Materials Express, is an associate professor of electrical and computer engineering at Purdue University, and adjunct associate professor in the department of photonics engineering at the Technical University of Denmark. She is an academic advisor to the OSA Purdue University Student
QCL Features Higher Power, Wider Tuning Range
EVANSTON, Ill., Jan. 8, 2016 — Combining a tunable laser with an on-chip amplifier has enabled a versatile and powerful tool for spectroscopy and other applications. A team from Northwestern University demonstrated a single-mode quantum cascade laser (QCL) emitting at a...
Efficiency Record Set for Tandem Solar Cells
GOLDEN, Colo., Jan. 7, 2016 — A dual-junction semiconductor solar cell has overcome a theoretical limit to take a world record for efficiency — 29.8 percent. The device consists of a GaInP top cell developed at the National Renewable Energy Laboratory (NREL) and a...
Fluorescent Probe IDs Cancerous Tissue in Clinical Trial
DURHAM, N.C., Jan. 7, 2016 — An imaging probe that fluoresces in the presence of a cancer-related enzyme has been used safely in humans. Beyond increasing a surgeon's ability to locate and remove all of a tumor on the first attempt, the technology could also be help detect...
Optogenetic Method Investigated for Neuron Repair
MUNICH, Jan. 7, 2016 — An optogenetics method has been used to stimulate the repair of a single neuronal circuit in zebrafish larvae. The method could have future therapeutic applications as a treatment for neuropathies in humans and other vertebrates. Environmental...
Superconductor Ups Single-Photon Detection Accuracy
BOULDER, Colo., Jan. 6, 2016 — Improving on earlier technology, a single-photon detector made of superconducting nanowires offers reduced temporal jitter with less demanding cooling requirements. This greater precision at a higher temperature makes the new detector useful for...
OCT Detects, Assesses Bacterial Buildup on Medical Devices
IRVINE, Calif., Jan. 6, 2016 — Optical coherence tomography (OCT) has been used to detect bacterial buildup on medical devices in an effort to reduce infections in hospitals. The research was led by Andrew Heidari from the University of California, Irvine, along with researchers...
Fiber Optic Sensor Monitors Early Stage Embryos
ADELAIDE, Australia, Jan. 5, 2016 — A fiber optic sensor holds promise for noninvasively monitoring early stage embryos during the in vitro fertilization (IVF) process. The sensor concurrently measures hydrogen peroxide and pH in solution, and consists of a single optical fiber, the...
Application Note: Filming 'Killer Cells' in 3D to Aid Immune Response
CAMBRIDGE, England, Jan. 1, 2016 — Watching the formation of the human immune system's "killer cells" could help scientists develop new ways to target cancer. Researchers at Cambridge University used a confocal spinning disk microscope equipped with electron multiplying CCD (EMCCD)...
Worm Brain Imaging Illustrates Neurons' Role in Movement
PRINCETON, N.J., Dec. 31, 2015 — A fluorescence microscopy technique has yielded 3D footage of brain activity in unrestrained worms, offering insight into how populations of neurons generate animal behavior. Researchers from Princeton University developed an instrument capable of...
Thermal Contrast Technique Reveals Cell Characteristics
BORDEAUX, France, Dec. 30, 2015 — A label-free technique based on a thermoelastic lens has been used to capture images of single cells with 2-μm resolution. The method could be used to perform histological analysis and for disease detection in tissue samples. Researchers from the...
Fluorescence Imaging 'Video Pill' Made for Cancer Detection
GLASGOW, Scotland, Dec. 29, 2015 — A wireless capsule with fluorescence imaging capabilities could be swallowed by patients to aid in detection of cancers of the throat and gut. Previous versions of such "video-pills" have relied on illuminating patients' innards using a small light...
Metasurface Encodes IR Images
PALAISEAU, France, Dec. 28, 2015 — Irregular metasurfaces can be made to encode multiple images at IR frequencies in much the same way as the pixels in a television screen can form a visible-light image. This was demonstrated with an array of subwavelength metal-insulator-metal (MIM)...
Optical Resonators Probed with Ion Beams
GAITHERSBURG, Md., Dec. 27, 2015 — Ion beams can subtly measure and adjust the performance of microscale optical resonators, a finding that could help refine production of such cavities for applications in sensing and quantum computing. Researchers at the National Institute of...
Laser Measurements Simplify Electronics Testing
BRAUNSCHWEIG, Germany, Dec. 26, 2015 — Femtosecond lasers may provide a cost-effective alternative to conventional vector network analyzers for high-frequency measurements involved in electronics testing. Researchers at Physikalisch-Technische Bundesanstalt (PTB) carried out such...
Multispectral Camera Tracks Earth's Atmosphere from Distant Orbit
GREENBELT, Md., Dec. 24, 2015 — NASA's Earth Polychromatic Imaging Camera (EPIC), affixed to NOAA's Deep Space Climate Observatory (DSCOVR) about a million miles from Earth, has begun capturing images of the planet's clouds, land surfaces, aerosols and more. EPIC captures a color...
'Rubber Laser' Material Advances Sensor Technology
KENT, Ohio, Dec. 23, 2015 — A rubberlike material that emits coherent light without mirrors — even while it's being stretched — could be used in remote sensors or as a tunable light source. Liquid crystal elastomers (LCEs) can curl up, bend, twist, wrinkle and...
Microprocessor Integrates Silicon Photonics
BERKELEY, Calif., Dec. 23, 2015 — Made from silicon using conventional fabrication methods, a microprocessor that integrates multiple photonic components is said to be the first to communicate directly with other devices using light. The device consists of two processor cores with...
No Differences Seen Between Supplemental LED, HPS Lighting in Tomato Growth
WEST LAFAYETTE, Ind., Dec. 22, 2015 — A feasibility study has shown that using LEDs as greenhouse grow-lights for tomato crops does not diminish fruit quality, suggesting a potential alternative for or supplement to high-pressure sodium (HPS) lights. While favored for their...
Portable NIR Brain Imaging Device Offers Insight into Parksinsonian Syndromes
NEW YORK, Dec. 22, 2015 — A portable near-infrared brain imaging device has been used to compare healthy brain activity and stability with that of people with Parkinsonian syndromes. The findings highlight the role of the prefrontal cortex in balance control, and may aid in...
App Categorizes Street Scenes in Real Time
CAMBRIDGE, England, Dec. 21, 2015 — Adept at identifying roads, pedestrians, buildings and more, two smartphone apps could form the basis of an autonomous vehicle navigation system. Developed by researchers at the University of Cambridge, the apps cannot currently control a driverless...
Metal Labels Produce 3D Images of Neurons
MINNEAPOLIS, Dec. 21, 2015 — Spectral confocal microscopy has been used to visualize neurons with the help of silver- and gold-based cell labeling. The development enables imaging of archived tissue samples, which could aid long-term clinical research efforts and diagnostics...
VECSEL Eyed for Terahertz Sensing Applications
LOS ANGELES, Dec. 21, 2015 — A semiconductor laser that emits at terahertz frequencies could drive development of a new class of lasers for materials analysis and threat detection. The first vertical-external-cavity surface-emitting laser (VECSEL) capable of operating in this...
Microscopic Laser Printing Method Could Hide Data, Simplify Production
LYNGBY, Denmark, Dec. 18, 2015 — A printing method using nanostructured surfaces and laser pulses has yielded a microscopic image with a resolution of 127,000 dots per inch. The color reproduction the Mona Lisa, created by researchers from the Technical University of Denmark (DTU),...
Application Note: OCT System Captures 'Internal' Fingerprints
PARIS, Dec. 17, 2015 — A sensor system based on full-field optical coherence tomography (FF-OCT) can distinguish real fingerprints from fakes by imaging deeper. Most traditional fingerprint-scanning devices use an optical camera to take pictures of only the top layer of...
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