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Research & Technology News
Diamond Defects Enhance Single-Photon Emission
WEST LAFAYETTE, Ind., Jan. 14, 2015 — Nanodiamonds containing atomic-scale defects can enhance metamaterials’ emission of single photons — an important attribute of future quantum computers. A team at Purdue University, in cooperation with Russian researchers, coupled nanodiamonds with nitrogen vacancy centers with a metamaterial lattice made of titanium nitride (TiN) and aluminum scandium nitride (AlxSc1-xN). The metamaterial is pumped by a laser. “These results indicate that the brightness of the
Inorganic Compound Could Replace Laser Dyes
MADRID and PRAGUE, Jan. 14, 2015 — An inorganic compound may serve as a longer-lasting replacement for laser dyes in a variety of applications. A team from the Spanish National Research Council (CSIC) and the Academy of Sciences of the Czech Republic, developed a laser whose medium...
Technique Enables Better Quantum Detectors
CAMBRIDGE, Mass., Jan. 14, 2015 — An array of single-photon detectors on a silicon chip could help progress the development of quantum computations. Researchers at MIT, IBM and NASA’s Jet Propulsion Laboratory describe the technique for fabricating and testing individual...
Material Overcomes Plasmon Damping
BARCELONA, Spain, Jan. 13, 2015 — High-quality graphene sandwiched between two films of hexagonal boron nitride allows plasmons to propagate over relatively large distances without losing energy. A research team led by the Institute Of Photonic Sciences (ICFO) studied the material...
Nanolaser Detects Biomolecules
YOKOHAMA, Japan, Jan. 13, 2015 — A laser biosensor has demonstrated a simpler way to identify DNA and biomarker proteins via changes in a solution’s surface charge density or pH. A team from Yokohama National University developed the GaInAsP photonic crystal nanolaser...
Solar Material Produces ‘Twin’ Charges on Single Molecules
UPTON, N.Y., Jan. 12, 2015 — A new polymer solar cell seeks to achieve lower thermal loss by producing two charge carriers per molecule rather than one. The materials were designed and synthesized by a Columbia University research team, then analyzed using time-resolved optical...
New Model Could Bring Custom Optogenetics Proteins
BOCHUM, Germany, Jan. 8, 2015 — Deeper understanding of the molecular mechanisms of a light-sensitive protein could lead to more specialized optogenetics techniques. Researchers at Ruhr University Bochum probed channelrhodopsin-2, which is already widely used in optogenetics...
AOM Reaches Unprecedented Speeds
BRISTOL, England, Jan. 7, 2015 — A new acousto-optic modulator can steer laser beams at unprecedented speeds, potentially enabling finer light control for microscopy and other applications. The device features a liquid-filled cavity surrounded by a cylindrical ultrasound transducer...
Drug Fluoresces, Kills Cancer Under 1 Wavelength
CORVALLIS, Ore., Jan. 6, 2015 — A combined imaging and phototherapy technique could help guide surgeons removing chemotherapy-resistant tumors — and kill any cancer cells the surgeons miss. Researchers at Oregon State University said their technique completely prevented...
Viruses Reveal Color-Coded Brain
SOUTHAMPTON, England, Jan. 5, 2015 — A technique for introducing multiple fluorescent labels in vivo could deepen scientists’ understanding of the brain. Researchers at the University of Southampton injected mouse brains with a solution containing three viral vectors that produce...
Light Propagation Made Visible in Solar Cells
JÜLICH, Germany, Jan. 2, 2015 — Near-field optical microscopy has provided a glimpse inside the workings of thin-films solar cells, potentially offering a route to optimizing them and other nanophotonic devices. The technique uses a glass fiber tip to measure the the amount of...
Optogenetics Used to Induce REM Sleep in Mice
CAMBRIDGE, Mass., Jan. 2, 2015 — Optogenetic activation of certain brain cells could be used to induce rapid-eye-movement (REM) sleep, which is crucial for keeping both body and mind healthy. MIT researchers targeted cholinergic neurons in two parts of the mouse brainstem, finding...
Sunlight Produces Hydrogen via ‘Artificial Leaf’
BERKELEY, Calif., Dec. 31, 2014 — A flat mesh of light-absorbing semiconductor nanowires can split water molecules, producing hydrogen gas that could be used for fuel. The “artificial leaf” was developed by a team led by professor Dr. Peidong Yang of University of...
Tumor-Zapping Endoscope in Development
BUFFALO, N.Y., Dec. 31, 2014 — A proposed endoscope that would provide high-quality images of tumors in internal organs could also assist in the delivery of chemotherapy drugs. Spatial frequency domain imaging gives the endoscope improved image contrast by projecting patterns of...
Defect Control Yields More Reliable Qubits
CAMBRIDGE, Mass., Dec. 30, 2014 — Enhancing the fluorescent light emission from atomic defects in diamond could be a key step toward creating reliable qubits for quantum computers. A team of researchers from several institutions has demonstrated photonic cavities with Q factors of...
Photoacoustics Promising for Cervical Cancer Assessment
CHANGSHA, China, Dec. 30, 2014 — Photoacoustic imaging could one day provide a quicker and less invasive alternative to current methods for detecting cervical cancer. Following a study of 30 cervical tissue samples, researchers at Central South University in China said the...
Nanofiber Integrated with Quantum Dots
TOKYO, Dec. 29, 2104 — A research team from the Center for Photonic Innovations at the University of Electro-Communications has integrated quantum light sources with nanofibers, a possible step toward a quantum Internet. A computer-controlled picoliter liquid dispenser...
Optogenetics Gives 'Read-Write' Access to Brain
LONDON, Dec. 29, 2014 — Combing two light-based techniques has enabled researchers at University College London to both observe and control brain activity in mice. The approach involves simultaneous two-photon optogenetic activation of a red-shifted opsin in multiple...
2-D Material Shows Promise for Image Sensing
HOUSTON, Dec. 22, 2014 — Ultrathin chalcogenide films could form the basis of tiny, adaptable bioimagers. Composed of copper indium selenide (CIS), a prototype three-pixel CCD has already demonstrated the ability to capture and store image information, according to...
Lens-Free 3-D Microscope Sharp Enough for Pathology
LOS ANGELES, Dec. 18, 2014 — A computational lens-free, holographic on-chip microscope could provide a faster and cheaper means of diagnosing cancer and other diseases at the cellular level. Developed by researchers at the University of California, Los Angeles, the compact...
Silicon Chip Produces Tunable Photon Pairs
SAN DIEGO, Calif., Dec. 17, 2014 — A silicon photonic chip that emits entangled photon pairs in a controlled fashion could one day enable quantum transceivers. Developed at the University of California, San Diego, the chip is pumped by a telecommunications-grade low-power diode...
Terahertz, IR Beams Detect Trace Gases at a Distance
DURHAM, N.C., Dec. 17, 2014 — A combination of IR and terahertz radiation (T-rays) is giving scientists a nose-up on toxic gases. This technology is able to sniff out even trace amounts of harmful gases — from chemical spill effects to nerve gas attacks — in the air...
Nanoparticle Paint Enables Fraud-Proof Credit Cards
ENSCHEDE, Netherlands, Dec. 16, 2014 — Light could soon build a brick wall between credit cards and hackers, as a fraud-proof authentication technique can keep credit cards and the identities associated with them secure. The technique — quantum-secure authentication (QSA),...
‘Smart’ Windows Block Heat, Not Light
SHANGHAI, Dec. 15, 2014 — A new kind of smart window blocks out heat when the outside temperature rises, potentially reducing the use of air conditioning. Developed by researchers from several Chinese institutions, the windows turn an opaque white in response to external...
Smaller, Faster Lidar Could Map Seafloor from Aerial Drones
ATLANTA, Dec. 15, 2014 — A lidar system light enough to fly on a drone and fast enough to process highly distorted signals in real time could enhance underwater mapping and security. Firing a high-power green laser 10,000th of a second, a prototype built at the Georgia Tech...
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