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Research & Technology News
Solar Cells Made Cheap with ‘Spray Paint’
SHEFFIELD, England, Feb. 11, 2013 — Solar cells fabricated using a “spray painting” process could provide a cost-effective alternative to conventional silicon-based cells and make photovoltaic technology available to people in developing countries.
Black Silicon Boosts Solar Cell Efficiency
HELSINKI, Feb. 7, 2013 — Black silicon surfaces on solar cells can elevate their efficiency to new levels, research out of Finland reports.
Prism Awards Honor Innovations in Photonics
SAN FRANCISCO, Feb. 7, 2013 — An early-stage diagnostic tool for skin cancers, a portable device to test for toxins in water and food, and a versatile laser capable of meeting multiple industrial needs were among 10 winners of the 2013 Prism Awards for Photonics Innovation...
Using Fiber Lasers for Particle Acceleration Technologies
SOUTHAMPTON, England, Feb. 7, 2013 — A novel laser system combining the output of thousands of pulsed fiber lasers could be the solution to two main issues affecting current laser particle acceleration technologies: efficiency and repetition rates.
Improved ‘Peacock’ Tech Could Lead to Better Hi-Res Displays
ANN ARBOR, Mich., Feb. 6, 2013 — Peacock feathers have a beautiful iridescence — a sheen that shifts color depending on a viewer’s perspective. But, for engineers trying to reproduce the birds’ unique color mechanism to develop high-resolution, reflective color display screens, the...
Rare Mineral Yields Light-Emitting Nano Triangles
UNIVERSITY PARK, Pa., Feb. 6, 2013 — A rare mineral formed into single sheets has yielded triangular structures with unusual light-emitting properties that could be used in optical technologies such as light detectors or lasers.
Gold Nanoparticles Boost QD Glow
GAITERSBURG, Md., Feb. 5, 2013 — A DNA template that controls the distance between gold nanoparticles and quantum dots can predictably increase or decrease the intensity of a quantum dot’s fluorescence. The breakthrough could lead to the use of quantum dots as a component in better...
Laser Plasma Process Could Advance Optoelectronic Materials
MONTREAL, Feb. 5, 2013 — A novel nanohybrid structure synthesized using a pulsed laser ablation technique could yield a new generation of optoelectronic switches, fast photodetectors and third-generation solar devices.
Light-Activated ‘Living Crystals’ Created
NEW YORK, Feb. 4, 2013 — Birds of a feather flock together, but what causes these flocks to form and move in a particular way has always been a fundamental question in nature. Now, however, a method using “living crystals” that behave in near-lifelike ways when activated by...
Optical Fibers May Transport Quantum Information
INNSBRUCK, Austria, Feb. 4, 2013 — Optical fibers, which transport data around the world, now may be able to carry quantum information, according to new research out of Austria.
‘Hyper’ Ramsey excitation confirmed
BRAUNSCHWEIG, Germany – Shining laser light onto atoms and molecules is the best way to obtain precise information about their inner structure, but light above a certain intensity can fundamentally change their energy levels. A group in Germany has demonstrated how to...
BSI Presents Awards for Advances in Ultrafast Research
EAST LANSING, Mich., Feb. 1, 2013 — Dr. Jan Rothhardt and professor Georgios Alexandrakis will be recognized for their contributions to ultrafast research during an awards reception hosted by Biophotonic Solutions Inc. (BSI) during Photonics West 2013 in San Francisco.
CERN detector to measure supershort pulses
VIENNA – Conventional measurement techniques soon will be too slow to measure phenomena taking place on timescales faster than an attosecond. To measure such light pulses, scientists have proposed a method to create the world’s most precise stopwatch....
Defying expectations, x-ray laser supercharges atoms
MENLO PARK, Calif. – Using a single flash from the world’s most powerful x-ray laser, researchers have stripped a record number of electrons from xenon atoms, creating a “supercharged,” strongly positive state at energies previously thought too low....
Grad Student to Build Camera for Space Mission
GLENDALE, Ariz., Feb. 1, 2013 — An infrared and visible light camera system developed by a third-year graduate student at Arizona State University will launch on a space satellite to guide its trajectory and take images of a solar sail as it opens.
Mechanical oscillator transfers optical signals
EUGENE, Ore. – Suppose you needed two PCs to exchange information. The process would be relatively easy because they speak the same language. Between a PC and a Mac, however, you would need a middleman, although that problem is still relatively simple. But what if...
Metamaterials manipulate light on a microchip
UNIVERSITY PARK, Pa. – Controlling light on a microchip is no easy feat, but new theoretical designs for miniaturized optical devices made of metamaterials could make it a little easier. A unified theory from researchers at Penn State University combines metamaterials and...
Nanotubes on a Chip Simplify Optical Power Measurements
GAITHERSBURG, Md., Feb. 1, 2013 — A novel chip-scale instrument made of carbon nanotubes may simplify absolute measurements of laser power, especially the light signals transmitted by optical fibers in telecommunication networks.
Near-perfect optical absorber developed
CAMBRIDGE, Mass. – A tunable device coated with a film 100 times thinner than the wavelength of incident light absorbs 99.75 percent of a specific mid-infrared band on demand, potentially expanding thermal detection and energy harvesting applications. Designed by...
Raman researchers set a trap to cool ions
BANGALORE, India, and MAINZ, Germany – Trapping ions with cold atoms cools the ions and could lead to experiments that generate molecular ions at interstellar space temperatures. The traps also can store ions in a stable condition for longer periods than previously demonstrated. Methods...
Recipe for supercheap hydrogen: sunlight + water + rust
LAUSANNE, Switzerland – Water and rust can make supereconomical hydrogen from sunlight, a team from École Polytechnique Fédérale de Lausanne (EPFL) reported recently. Researchers have been pursuing the conversion of solar energy into...
Theoretical calculation proposes using heat to power QCLs
INNSBRUCK, Austria – Heat generated in a quantum cascade laser (QCL) – something that normally causes the lasing to turn off – could actually be used to power the device instead, according to a theoretical calculation developed at the University of...
Tiny probes dramatically boost Raman signals
ST. LOUIS – Novel gold nanoparticles can goose the signal from Raman reporters, or molecules whose jiggling atoms respond to a probe laser by scattering light at characteristic wavelengths. The discovery could lead to better-targeted drug delivery and deeper...
Microimplant Controls Nerve Cells with a Laser
FREIBURG, Germany, and BASEL, Switzerland, Jan. 31, 2013 — A microimplant that can genetically modify specific nerve cells, control them with light stimuli and measure their activity simultaneously could pave the way for completely new experiments in neurobiology.
Next-Gen Solar Cells Trap Sunlight with Microbeads
OSLO, Norway, Jan. 31, 2013 — Silicon solar cells 20 times thinner than commercial ones were produced using 95 percent less silicon, reducing production costs considerably. The trick: Using a back sheet peppered with microbeads that trick light into staying longer within the...
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