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education News
Light, Oxygen and Moisture Combine to Mend Defects in Industrial Perovskite Films
CAMBRIDGE, England, Sept. 28, 2017 — Exposure to light combined with exposure to humidity and oxygen has been shown to permanently correct defects in the molecular structure of perovskites, resulting in minimal non-radiative losses and properties approaching those of perovskite single crystals and crystalline semiconductors. Tiny defects (traps) in the crystalline structure of perovskites can constrict electrons before their energy can be harnessed for use by a solar cell. The more freely electrons can move around in the
Photorealistic 3D Renderings Accurately Digitize Transparent Objects
KONGENS LYNGBY, Denmark, Sept. 28, 2017 — The ability to create detailed, 3D digital versions of clear objects and their surroundings has been difficult for researchers because of the different modalities required to digitize objects with diffuse reflectance properties. Scientists from the...
Scaled-Up Mirror-Coating Technology Could Improve Telescope Efficiency
SANTA CRUZ, Calif., Sept. 28, 2017 — Scientists are adapting atomic layer deposition (ALD), a technique widely used in the microelectronics industry, to develop protected silver coatings suitable for telescope mirrors. These coatings could help telescopes maintain high reflectivity at...
Light Pulses Quickly Drive Electronic Currents Through Graphene
ERLANGEN, Germany, Sept. 27, 2017 — Physicists have used light to control an electronic current through graphene within one femtosecond. According to the research team this speed could be more than a thousand times faster than the speed of current transistors. While it’s...
Ballistic Photon Imaging Locates Fiber Optic Instruments In Vivo
EDINBURGH, Sept. 27, 2017 — A camera that detects light sources inside the human body could be used at a patient’s bedside to track and guide the location of an endoscope, or other fiber-optic instrument, in the body without the need for x-rays or other equipment. Light...
Photosensitizer Enhances The Anticancer Properties of an Antimalarial Drug
SINGAPORE, Sept. 26, 2017 — Scientists have shown that the anti-cancer properties of artemisinin, an anti-malarial drug that is also a promising alternative cancer treatment, could be enhanced potentially ten-fold when used with the photosensitizer aminolaevulinic acid (ALA)....
Quantum Repeater Could Speed, Secure Long-Distance Quantum Communication
JOHANNESBURG, South Africa, Sept. 25, 2017 — Researchers have experimentally demonstrated photon entanglement swapping and teleportation for multiple orbital angular momentum (OAM) states of light. When OAM is used as an information carrier, photon states can decay over long distances; thus a...
Converting Light to Sound Waves Leads to Hybrid Chip for Data Transfer
CAMPERDOWN, Australia, Sept. 22, 2017 — Researchers have demonstrated a way to transfer optical information coherently to an acoustic hypersound wave on a photonic microchip. Optical information is extracted using a reverse process. A coherent buffer can store the photonic information in...
QD Lasers Epitaxially Grown on Silicon Could Be Smallest to Date
HONG KONG, Sept. 21, 2017 — Record-small electrically pumped micro-lasers have been epitaxially grown on industry standard (001) silicon substrates. Continuous-wave lasing up to 100 degrees Celsius was demonstrated at 1.3 μm communication wavelength. Researchers achieved a...
Univ. of Arkansas Professors Awarded $250K NSF Grant for Microwave Photonics Chip
FAYETTEVILLE, Ark., Sept. 20, 2017 — The U.S. National Science Foundation has awarded a $250,000 grant to two professors at the University of Arkansas to develop a new integrated microwave photonics (IMWP) chip. Titled “EAGER: Sapphire Based Integrated Microwave Photonics,”...
Underwater Video Achieves Quality by Improving Bandwidth
THUWAL, Saudi Arabia, Sept. 20, 2017 — Underwater wireless optical communication (UWOC) systems could be a flexible and cost-effective technology for streaming high-quality underwater video images. Existing technologies like acoustic communications and low-frequency radio waves are...
Physicists Identify Optimum Conditions for Laser Plasma Acceleration
DRESDEN, Germany, Sept. 19, 2017 — Laser plasma acceleration, which has a smaller footprint and higher peak currents than conventional electron accelerators, could be the basis for the next generation of compact light sources. To make laser plasma acceleration practical for future...
Insight into Glass Formation Could Lead to Coatings, Other Applications
PHILADELPHIA, Sept. 18, 2017 — To better understand the optical properties of stable glasses, and whether they are analogous to the properties of naturally aged glasses, researchers developed perfectly round molecules that retain their three-dimensional shapes and do not...
VLBI, Gaia Data Could Improve Our Understanding of Quasars
MOSCOW, Sept. 18, 2017 — By analyzing unexpected discrepancies between high-precision observations conducted by an international network of radio telescopes and that of Gaia, the space observatory of the European Space Agency, scientists have determined the properties of...
UArizona’s Norwood Awarded $3.7M by DOE for Solar Technologies
TUCSON, Ariz., Sept. 18, 2017 — Robert Norwood, a University of Arizona professor of optical sciences, has been awarded $3.7 million dollars in two separate programs by the Department of Energy's Advance Research Programs Agency (ARPA-E) to make significant advances in the...
Graphene-Based Absorbers Could Enable Ultrafast Lasers in THz Range
MODENA, Italy, Sept. 15, 2017 — A terahertz (THz) saturable absorber has been created using printable graphene inks produced by liquid phase exfoliation (LPE) and deposited by transfer coating and ink jet printing. A THz saturable absorber, which decreases the absorption of light...
Device Allows Standard Cameras to Produce Hyperspectral Images
BEER-SHEVA, Israel, Sept. 14, 2017 — A miniaturized hyperspectral device has been developed as an add-on for a standard camera, and could be used to repurpose a camera for generating hyperspectral images and videos for a range of applications. Developers of the device used compressive...
Cloaking Approach Prevents Light Scattering in Opaque Objects
VIENNA, Sept. 14, 2017 — In a novel approach to cloaking technology, researchers irradiated an opaque material from above, using a specific wave pattern that allowed light waves from the left to pass through the material without any obstruction. The researchers believe that...
Nicolaas Bloembergen, Winner of Nobel Prize in Physics, Dies at 97
TUCSON, Ariz., Sept. 13, 2017 — Dutch-born optics pioneer and Nobel Prize winner Nicolaas Bloembergen died on Sept. 5 in Tucson, Ariz. He was 97. The cause of death was cardiorespiratory failure. Dr. Bloembergen, who spent more than 40 years at Harvard University, made lasting...
Tunable Nanoparticle Layer Switches Between ‘Mirror,’ ‘Window’
LONDON, Sept. 13, 2017 — Researchers have made a reversible electrotunable filter that can change between a reflective ‘mirror’ and a transmissive ‘window’. This discovery could help scientists create special materials whose optical properties could...
Doppler Lidar Could Aid Weather Forecasting, Aircraft Safety
HEFEI, China, Sept. 12, 2017 — A dual-frequency direct detection Doppler LiDAR system could offer a simplified yet robust way to accurately measure wind speed. The detailed, real-time wind measurements provided by the system could help scientists better understand how hurricanes...
Photoacoustic Imaging Technique Measures Periodontal Health
LA JOLLA, Calif., Sept. 12, 2017 — Using squid ink as a contrast agent for a photoacoustic ultrasound, researchers have developed a dental imaging method for assessing gum health that is non-invasive, comprehensive and accurate. The photoacoustic method can image the entire pocket...
3D Printing Technique Makes Degradable Biomaterials
PROVIDENCE, R.I., Sept. 11, 2017 — A stereolithographic technique has been developed for making 3D printed biomaterials that can undergo controlled degradation. This technique uses non-covalent (ionic) crosslinking and could potentially enable the fabrication of adaptive and...
High-Speed Quantum Memory Retrieves Photons on Demand
BASEL, Switzerland, Sept. 11, 2017 — A quantum memory that offers relatively fast and simple retrieval could someday be used for building a “quantum Internet.” The technology stores photons in a gas of rubidium (RB) atoms and uses a laser to control the storage and...
QUT to Deploy Drones for Koala Protection
BRISBANE, Australia, Sept.11, 2017 — The Queensland University of Technology (QUT) will deploy drones in a high-tech effort to find and protect koalas in South East Queensland, with the state government announcing a funding boost for koala conservation. The two-year project to be led...
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