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Research & Technology News

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) resonators that revealed different letters and even a famous painting when heated and imaged at different wavelengths and polarizations. Applications of the technology could include biochemical sensing, optical storage and
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...
Semiconductor Interface Emits UV Light in Presence of Water
PHILADELPHIA, Dec. 17, 2015 — Just a few molecules of water can cause a complex oxide material to emit intense UV light, a discovery that could have bearing on chemical sensors and optical computing. The phenomenon was observed by a team led by researchers at the University of...
Correlated Metal Films Eyed for Affordable Displays
UNIVERSITY PARK, Pa., Dec. 16, 2015 — A highly transparent and electrically conductive metal thin film holds promise as an alternative to indium tin oxide (ITO) in displays, windows, touch screens and solar cells. ITO is a transparent conductor used in more than 90 percent of the...
Laser Ranging System Tracks Movement of Hidden Objects in Real Time
EDINBURGH, Scotland, Dec. 15, 2015 — A single-photon avalanche diode camera system has been used to image objects located out of the camera's line of sight and track their movements with centimeter precision. REAS Camera that tracks hidden objects. A laser ranging system can see around...
ICFO Receives $1.9M for Quantum Cryptography Research
BARCELONA, Spain, Dec. 15, 2015 — ICFO, the Institute of Photonic Sciences, has received €1.7 million (about $1.86 million) from the Axa Research Fund to fund a permanent chairmanship for quantum cryptography technology research, addressing rising data security issues among...
Injket Method Cuts Hologram Production Costs, Time
ST. PETERSBURG, Russia, Dec. 15, 2015 — Rainbow holograms like those used to protect credit cards and currency can be created with an ordinary inkjet printer, reducing production time and cost. The technique was developed at the St. Petersburg National Research University of Information...
Terahertz Source Inspects Bridge Components
SENDAI, Japan, Dec. 14, 2015 — Terahertz waves could be especially useful in the safety inspection bridges that use prestressed concrete (PC) steel wires hidden inside external cables covered by resin jackets. That's the conclusion of researchers at Tohoku University who...
Diagnostic Method Employs Birefringence of Liquid Crystals
ZURICH, Dec. 14, 2015 — A detection system that uses birefringence as the sole optical output signal holds promise as a low-cost, rapid diagnostic tool for identifying biomarkers, viruses, bacteria and parasites in the field. Scientists from ETH Zurich (the Swiss Federal...
Application Note: IR Imaging Differentiates Skin from Other Materials
SANKT AUGUSTIN, Germany, Dec. 11, 2015 — Systems using IR wavelengths to distinguish skin from other materials hold promise for improving search and rescue efforts and defending against efforts to deceive biometric systems. The proliferation of face-recognizing biometric systems for...
Nanostructured Thin Films Boost Optoelectronics' Efficiency
CHAMPAIGN, Ill., Dec. 10, 2015 — A antireflection coating allows LEDs, solar cells and sensors to capture light without hampering the flow of electricity, which could increase efficiency in such optoelectronic devices. Developed at the University of Illinois at Urbana-Champaign, in...
Spectroscopic Probe Monitors Photoconversion Process
GOLDEN, Colo., Dec. 10, 2015 — A measurement probe could lead to improvements in how photoelectrodes are designed, making them more efficient and stable. Photoelectrochemical cells can be used to convert solar energy into transportable chemical fuels. The photoconversion process...
Laser-Triggered Drugs Manage Pain in Preclinical Models
BOSTON, Dec. 9, 2015 — Two prospective approaches to pain management use lasers to either release local anesthetics at the site of an injury or block pain signals. Preclinical studies using the techniques, conducted by researchers at Boston Children's Hospital and at the...
Single Photons Separated from Light Pulses
REHOVOT, Israel, Dec. 8, 2015 — Separating single photons from pulses of light could enable eavesdropping on encrypted quantum communications — but it could also help make such channels more secure. Researchers at the Weizmann Institute of Science have demonstrated how to...

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