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Research & Technology News
Nanomaterial combinations enhance IR photodetection
TEMPE, Ariz. – Improved infrared photodetector technology that uses ultrathin layers of materials should have an impact on critical applications ranging from national defense to medical diagnostics. Arizona State University researchers have discovered how infrared photodetection can be achieved more effectively using certain materials arranged in specific patterns in atomic-scale structures. The scientists formed crystals on multiple nanometer-thick layers of materials, then combined the layered structures ...
New bandgap boundaries could boost electronics
OAK RIDGE, Tenn. – A new layer-by-layer growth technique that reduces the bandgap of complex metal oxides by 30 percent could improve the performance of solar cells, LEDs, displays and other electronic devices. For years, complex transition metal oxides have...
New resonator overcomes obstacle to ultimate nanolaser
SAN DIEGO – Two very low power lasers that produce the smallest continuous-wave, room-temperature telecommunications frequency demonstrated to date may be a step closer to creating virus-size nanolasers. The new instruments – a 1.5-µm laser and a...
Tunable optical filter uses nanoantennas
CAMBRIDGE, Mass. – A new tunable color filter based on optical nanoantennas can precisely control color output, enabling its use for display and bioimaging applications and for marking currency. By precisely controlling the shape of the nanoantennas, engineers at...
Diatom Biosensor Could Detect Chemicals in Water
SEQUIM, Wash., March 30, 2012 — A biosensor made of fluorescent proteins that are embedded in the shell of microscopic marine algae called diatoms could help detect chemicals in water samples. The device could help produce nanomaterials that can solve sensing, catalysis and...
Many-Body System Beats Computer in Simulating Quantum Dynamics
MUNICH, Germany, March 29, 2012 — A recent experiment has shown that a many-body system of ultracold atoms can be used as a quantum simulator for experiments where classical computers fail. This also allows physicists to have a better understanding of how particles tunnel, and it...
Novel Plasmonic Material Discovered
WEST LAFAYETTE, Ind., March 30, 2012 — Titanium nitride, the first nonmetal to be added to the short list of surface-plasmon-supporting materials, could bridge the gap between optics and electronics. The advance could point the way to a new class of optoelectronic devices with...
Quantum Plasmon Resonance Illuminated
STANFORD, Calif., March 29, 2012 — Plasmon resonance at the nanoscale, the phenomenon responsible for the vibrant hues of stained-glass windows, can kill cancer cells and has the potential to drive forward quantum optics and bioimaging, new research suggests. Plasmon resonance is...
Cell Repair Seen in Real Time
KARLSRUHE, Germany, March 29, 2012 — Cell membrane repair in a living organism was observed for the first time in real time using a high-resolution fluorescence imaging technique. The findings may contribute to the development of therapies for human myopathies and pave the way for new...
Laser Mixing Generates Multifrequency Light
SANTA BARBARA, Calif., March 29, 2012 — A groundbreaking laser mixing technique can manipulate electron-hole collisions to create many frequencies of light simultaneously. This mechanism for ultrafast light modulation has potential applications in high-speed optical communications.
Nanostars Seen as Superior for SERS
HOUSTON, March 29, 2012 — Synthesized starfruit-shaped gold nanorods could strengthen applications that rely on surface-enhanced Raman spectroscopy.
Quantum Dot Solar Cell Efficiency Boosted
BUFFALO, N.Y., March 29, 2012 — A collaboration between the US Army Research Laboratory (ARL) and State University of New York (SUNY) at Buffalo has led to the potential to boost the efficiency of quantum dot solar cells by a factor of two. The discovery could lead to lighter...
Seeking to Unify Physics with Mirrors
VIENNA, March 29, 2012 — An experiment designed to observe quantum interactions at the Planck scale could, if successful, help bridge the gap between quantum mechanics and general relativity. It would also remove the need to rely on high-energy experiments or distant cosmic...
New Tool Images Biomolecules
BERKELEY, Calif., March 28, 2012 — For the first time, optical nanoantennas can harness the power of plasmonics to study the dynamics of cell membrane biology. A unique artificial biological platform combines a fluid bilayer of lipid molecules with a fixed pattern of nanoantennas to...
PV Goes 3-D
CAMBRIDGE, Mass., March 28, 2012 — A new 3-D configuration for photovoltaic cells can generate 20 times more power than standard fixed flat panels with the same base area.
Swarm of Satellite-Operated Lasers for Asteroid Deflection
GLASGOW, Scotland, March 28, 2012 — A swarm of small satellite-operated lasers could deflect asteroids headed for a catastrophic collision with Earth, a discovery that could radically change asteroid deflection technology.
MIT Triggers Total Fear Recall in Mice
CAMBRIDGE, Mass., March 27, 2012 — An optogenetic technique that uses light to target specific populations of neurons in the brain was used to make mice recall fear memories and respond by freezing. Scientists at MIT used the technique to learn whether memory traces, known as memory...
Thermal Cloak Hides Heat
PARIS, March 27, 2012 — In a new approach to invisibility cloaking, French researchers propose isolating or cloaking objects from sources of heat — essentially “thermal cloaking.”
Lasers Boost Standoff Sensing
OAK RIDGE, Tenn., March 26, 2012 — A dual-laser pump-and-probe system developed at Oak Ridge National Laboratory enables the identification of biological agents and chemicals from a distance.
Photoacoustic Imaging Moves into Clinic
ST. LOUIS, March 26, 2012 — Photoacoustic tomography, which combines the best qualities of ultrasound and light absorption, can now provide clinicians with multicontrast images of biological tissue several inches below the skin’s surface.
Inner Life of Magnets Exposed
BOULDER, Colo., March 22, 2012 — Specialized x-ray lasers reveal the inner workings of magnets, a discovery that could lead to smarter, faster computers.
Microlens Arrays from a Test Tube
POTSDAM, Germany, March 22, 2012 — Simple calcium carbonate precipitation at ambient conditions can produce microlens arrays of uniform size and focal length, a cheaper alternative to lithographic techniques for making inorganic-based materials.
NIF Fires Record-Setting Laser Shot
LIVERMORE, Calif., March 22, 2012 — The 192 lasers fired in unison at the National Ignition Facility this week delivered a record 1.875 million joules of ultraviolet laser light to its target chamber, exceeding NIF’s original design specification and setting the stage for...
Proteins Shine a Brighter Light on Cellular Processes
GRENOBLE, France, March 22, 2012 — A molecule capable of emitting turquoise light within living cells three times brighter than ever achieved could improve the sensitivity of cellular imaging.
Laser ‘Unprinter’ Vaporizes Toner
CAMBRIDGE, England, March 21, 2012 — A laser device that vaporizes photocopied ink from paper could soon be in offices worldwide.
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