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Light Sources News
Carbon Nanotube-Based Lights More Efficient than LEDs
SENDAI, Japan, Oct. 15, 2014 — A new carbon nanotube-based light source touts power consumption that is about a hundred times lower than that of an LED. A team from Tohoku University developed the new light source, which uses around 0.1 W for every hour of operation. Carbon nanotubes (CNTs) are poised to replace silicon in making semiconductor materials, they said, and have the potential to meet the ever-increasing demand for greener bulbs and lighting devices. The new device is based on a phosphor screen and
Photon Emission Rate Enhanced in Fluorescent Molecules
DURHAM, N.C., Oct. 15, 2014 — Fluorescent molecules can be made to emit more photons by sandwiching them between metal nanocubes and a gold film. This film-coupled metal nanocube system features emitters embedded in the dielectric gap region. Its developers at Duke University...
Optogenetics Tests Memory Manipulation Theory
DAVIS, Calif., Oct. 13, 2014 — Optogenetics is giving scientists a better look at how different parts of the brain can work together to manipulate memories, proving a long-standing theory about retrieval of episodic memories.
Blue LED Inventors Win Nobel Prize
STOCKHOLM, Sweden, Oct. 7, 2014 — Three LED developers have been awarded the 2014 Nobel Prize in Physics.
Gas Purging Keeps UV Systems Healthy
Oct 6, 2014 — Photochemical deposition of organic films is a significant cause of performance loss in ultraviolet systems; when feasible, it can be reduced or eliminated with inert gas purging. Ultraviolet photons are highly energetic – enough to break...
Micro Thermal Camera Opens Applications to Consumers
Oct 6, 2014 — Personal thermal imaging just got affordable – but the technology can be used in various industries, too. Thermal imaging is hardly new, but most of us don’t carry thermal imagers in our pockets. Not yet. But it could happen soon, thanks...
Smile and Say, ‘Drone!’
Oct 6, 2014 — Any photographer will tell you that if it were possible to grow an extra set of hands, he would. As simultaneous scientists, artists and packhorses, photographers must know their equipment inside and out, but they must also be prepared to change...
Plessey Expands with In-House LED Assembly Line
PLYMOUTH, England, Sept. 29, 2014 — Plessey is expanding its facility here to include a new LED assembly line. This addition will allow the company to focus on its high-brightness LEDs for solid-state lighting and sensing. The expansion will cut production time and enable development...
Advances in Blue OLEDs Increase Efficiency and Lifetime
ANN ARBOR, Mich., Sept. 25, 2014 — Researchers in Michigan have discovered a way to extend the life of blue organic light-emitting diodes, which would lead to longer battery life in smartphones and lower power consumption for large screen televisions.
Inorganic Semiconductors Guide New Optoelectronic Devices
SEOUL, South Korea, Sept. 22, 2014 — Inorganic Semiconductors Guide New Optoelectronic Devices SEOUL, South Korea, Sept. 22, 2014 — Inorganic compound semiconductors could potentially replace those developed with organic materials. A research team from Seoul National University...
Nuclear Spins Boost Electric Current in OLEDs
SALT LAKE CITY, Sept. 19, 2014 — A spintronic approach has been used to power plastic organic LEDs at room temperature and without strong magnetic fields. “We have shown we can use room-temperature, plastic electronic devices that allow us to see the orientation of the...
Polarization Camera Sheds Light on Sea Life
ST. LOUIS and AUSTIN, Sept. 17, 2014 — A bio-inspired polarization camera has given marine biologists a better understanding of the mating rituals of the northern swordtail fish. The camera contains nanomaterials that allow it to capture the polarization properties of light in real time....
Fast, Room-Temperature THz Detector Made of Graphene
COLLEGE PARK, Md., Sept. 8, 2014 — COLLEGE PARK, Md., Sept. 8, 2014 — A prototype graphene photodetector is capable of detecting terahertz frequencies quickly and at room temperature, possibly enabling a new generation of see-through imaging. A hot-electron photothermoelectric...
Video: Battery Lead Gains New Life in Solar Panels
CAMBRIDGE, Mass., Sept. 8, 2014 — Dead auto batteries may be able to keep on truckin' as long-lasting solar panels.
Diode Lasers Break into New Wavelengths, New Applications
Sep 5, 2014 — New wavelengths, new production technologies and microassembly are all expected to help extend the reach of diode lasers in the future. The field of diode lasers is a dynamic, fast-developing area, enabling new applications to emerge continuously....
Had a few too many? A laser is waiting for you.
Sep 5, 2014 — “Don’t drink and drive.” You’ve heard it before, and you’ll hear it again. But some people still refuse to abide by that rule. It’s likely that you’ve shared the road with dozens of drunken drivers over your...
Lens-Free Microscopes Offer Real-Time Bio Imaging
Sep 5, 2014 — A totally different type of microscope will be much smaller and less complex than traditional microscopes, but more powerful. Two years ago, a customer handed Richard Stahl and the imec team a challenge: one year to develop a microscope that could...
SWIR Applications and Challenges: A Primer
Sep 5, 2014 — Infrared imaging opens endless possibilities for industrial, scientific and security image-processing applications. But short-wave infrared cameras must overcome the limitations of InGaAs sensor technology to provide high-quality images....
Dual-Band Monitoring Keeps Trains Running in Winter
Sep 4, 2014 — Keeping critical parts of the railroad infrastructure free of snow, sleet, hail and ice – and even detecting unauthorized persons walking the rails – is essential for a safe and uninterrupted transportation service. Dual-band monitoring...
Laser Technology Enhances Experience for Sports Fans, Refs
Sep 4, 2014 — A laser device helps spectators and officials to better visualize important markers, so that people in the stadium have the demarcation information offered to TV viewers at home. Science and technology are inextricably linked with sports. Over the...
QDs Generate Light for Next-Generation Displays
Sep 4, 2014 — Large color gamut and better color reproducibility will be highly desired features of displays in the near future. Quantum dots will be the down-conversion technology of choice, allowing LCD makers to cost-effectively reach and exceed 100 percent of...
Solar Cell Materials: Finding a Happy Medium
Sep 4, 2014 — Marrying the low cost of thin-film and the efficiency of crystalline silicon helps to improve solar cells. The solar industry is at another inflection point in its development. Costs have come down as a result of a significant increase in capacity,...
Understanding Actively Q-Switched Solid-State Lasers
Sep 4, 2014 — With an increased quantitative understanding of the operation of Q-switched lasers come huge benefits for laser design. This first article in a two-part series focuses on actively Q-switched lasers; the second part, in a later issue, will cover...
Vehicle Vision Puts the 'Auto' in 'Automobile'
Sep 4, 2014 — Vision systems are increasingly enabling self-driving cars to automatically park, maintain speed and prevent collisions. Can a world of ubiquitous self-driving cars be far off? Whether it’s a flying, automatically driven car like the...
‘Cannon’ Launches Single Photons
COPENHAGEN, Denmark, Sept. 2, 2014 — A new photonic "cannon" could provide the necessary light control for quantum encryption and computing.
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August 2024
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