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education News
Laser Welding Technique Expands Industrial Use of AHS-Grade Steel Alloys
SÃO PAULO, Brazil, Jan. 2, 2018 — A technique for high-temperature laser welding has been developed for use with advanced high-strength (AHS) steel alloys. High-strength steels exhibit improved formability and collision resilience compared to conventional steel grades. However, some of these high-strength alloys become brittle as a result of welding and could break when submitted to the hot stamping and forming required by many manufacturing processes. The technique, developed by researchers at the Brazilian Air Force
Time-Bin Encoding Technique Enables High-Rate QKD for Cybersecurity
SINGAPORE, Dec. 29, 2017 — Researchers have developed a quantum key distribution (QKD) system that enables a greater number of secret bits to be packed into a single photon. The new technique allows for two secret bits in a single photon, with a secret key rate of 26.2...
Researchers Use Multiplexing to Improve Quantum Memory Capacity
WARSAW, Poland, Dec. 29, 2017 — Researchers have built a quantum memory-enable source of spatially structured nonclassical light, based on a principle of wavevector multiplexing. The high-capacity memory, which is based on a group of laser-cooled atoms, can store up to 665 quantum...
Researchers Improve ToF Resolution 1000-Fold Using Computational Approach
CAMBRIDGE, Mass., Dec. 28, 2017 — In a novel approach to time-of-flight (ToF) imaging, researchers correlated the principle of heterodyning to increase ToF depth resolution 1,000-fold. Higher ToF resolution could enable accurate distance measurements through fog, removing a major...
Laser Scanner Could Help Diagnose Disease Before Vision Loss Occurs
BURNABY, British Columbia, Dec. 28, 2017 — A retinal imaging scanner has been developed that can produce high-resolution, 3D cross-sectional images of the retina, including individual photoreceptors and fine capillaries. The scanner is extremely compact (about the size of a shoebox), making...
Lensless Camera Creates Detailed 3D Images Without Scanning
BERKELEY, Calif., Dec. 27, 2017 — A new camera has been developed that produces 3D images from a single 2D image without using any lenses. Called DiffuserCam, the camera consists only of a diffuser placed a few millimeters in front of an image sensor. DiffuserCam integrates concepts...
Changchun Team Investigates Threshold and Light Amplification in Electrically Pumped OSLDs
CHANGCHUN, China, Dec. 22, 2017 — Organic semiconductor laser diodes (OSLDs) can be prepared using simple processing technologies and can be integrated easily with other optoelectronic devices. This makes them attractive for use in low-cost, compact, flexible and tunable lasers with...
Electron-Tunneling Nanomaterial Could Boost Optoelectronics and Sensing
LONDON, Dec. 22, 2017 — A material that uses quantum effects and allows precise control of hot electrons shows potential for use in chemical research, optoelectronics and sensing. Scientists at King’s College London developed the device which controls high energy...
Researchers Generate a Directional, Spin-Polarized Photocurrent Using Topological Insulator
MINNEAPOLIS/ST. PAUL, Minn., Dec. 21, 2017 — Researchers have developed a device for controlling the direction of photocurrent without using an electric voltage. This device, according to researchers, could provide a way of implementing coupled spin-orbit interaction between electrons and...
Spectroscopy Instrument to Aid in the Search for Extraterrestrial Life
HAMPTON, Va., Dec. 21, 2017 — Could life exist outside of Earth? All we know for sure is that scientists will keep exploring this question until they have a definitive answer. To that end, a compact spectroscopy instrument has been developed for use in planetary exploration. The...
Optofluidic Smart Glass Heats and Cools Efficiently, Inexpensively
NEWARK, Del., Dec. 20, 2017 — We may not be able to control the weather, but new switchable window technology using optofluidic smart glass could someday be used to keep our vehicles, businesses and homes comfortable regardless of the temperature outside. This smart window...
Next-Gen Image Sensor Delivers High-Quality, Low-Light Imaging
HANOVER, N.H., Dec. 19, 2017 — ; A new imaging technology has been developed that can capture and count single photons with resolution as high as one megapixel and as fast as thousands of frames per second. Called the Quanta Image Sensor, or QIS, this technology enables highly...
High-Performance Vector Polarizer Tailors Light
NANJING and TIANJIN, China and ORLANDO, Fla., Dec. 18, 2017 — A newly proposed design for a vector polarizer could enable flexible filtering of a wide range of light sources and the generation of new light states. The design can be used to tailor light intensity, phase and polarization. To increase polarizer...
Quantum Emitter Integration May Enable Quantum Circuits
ULSAN, South Korea, Dec. 14, 2017 — Researchers integrated silicon photonic devices with a solid-state single photon emitter, using a hybrid approach that combines silicon photonic waveguides with quantum dots. The silicon photonic waveguides were used for manipulating light, and the...
Team Studies Optical Properties of Plasmonic Nanovesicles
AUSTIN, Texas., Dec. 12, 2017 — An on-demand, light-triggered drug release method — vesicular assembly of small plasmonic nanoparticles, or plasmonic vesicle — could aid in treatment of disease, support efforts to study the nervous system in real-time, provide insight...
Hologram Memory Quality Key For Optical Data Storage
TOYOHASHI, Japan, Dec. 12, 2017 — A research team has applied magnetic assist recording technology to magnetic-holographic memory, reducing recording energy consumption and achieving non-error data reconstruction. Their work could pave the way for practical application of...
That Was Then, This Is Now: Fiber Optic Cables Find New Use as Seismic Sensors
BERKELEY and STANFORD, Calif., Dec. 11, 2017 — The decade that gave us the Sony PlayStation also gave us dark fiber – an excess of optical fiber cables installed underground, mostly in the 90s, before advances in data transmission reduced the need for all those cables. Now, research teams...
Transparent Materials Absorb Light
MOSCOW, Dec. 8, 2017 — Researchers have demonstrated an optical paradox — they have made a completely transparent material appear perfectly absorbing. The results of their research contradict the idea that materials that look transparent, such as glass, appear that...
Single-Shot Approach to HSI Uses Camera Equipped With Prism
DAEJEON, South Korea, Dec. 8, 2017 — A compact, low-cost, single-shot hyperspectral imaging method has been devised, which captures images using a conventional digital single-lens reflex (DSLR) camera equipped with an ordinary refractive prism placed in front of the lens. The new,...
Microscope Uses UV Light to Provide High-Res Images in Minutes, Without Damaging Tissue
SACRAMENTO, Calif., Dec. 6, 2017 — A fluorescence-based, slide-free optical imaging system, known as microscopy with UV surface excitation (MUSE), uses UV light at wavelengths below the 300 nanometer (nm) range to penetrate the surface of tissue samples by only a few microns —...
Hybrid Perovskite Material Could Be Key to Making Organic Diode Lasers
STATE COLLEGE, Pa., Dec. 5, 2017 — Researchers are closer to creating a tunable semiconductor diode laser from hybrid organic-inorganic perovskites. Using a material composed of an inorganic perovskite sublattice with relatively big organic molecules confined in the middle, a Penn...
All-Optical Ultrasound Transducer Could Transform Keyhole Surgeries
LONDON, Dec. 5, 2017 — An optical ultrasound needle has been developed that allows heart tissue to be imaged in real-time during keyhole procedures. The technology was successfully used for minimally invasive heart surgery on pigs, giving a high-resolution view of soft...
Researchers Manipulate Light to Make Optical Chip Invisible
BEER-SHEVA, Israel, Dec. 4, 2017 — Researchers have conceived a method that deflects and scatters light away from a ‘cloaking’ chip surface so it is not detected. The scattering fields of the object located on the cloak do not interact with the evanescent field, rendering...
Visible Light Controls Chemical Reaction Pathways, Could Be Industrial UV Alternative
BRISBANE, Australia, Dec. 4, 2017 — A technique has been developed that modulates visible colored light to enable it to control the reactions of chemical coupling agents. The modulation of the reactivity by light is reversible, and the individually addressable reaction pathways can be...
Four-Wave Mixing Paves Way for Optical Computing
LONDON, Dec. 4, 2017 — Researchers have reduced the distance over which light can interact by 10,000 fold by performing efficient four-wave mixing (FWM) over micrometer-scale interaction lengths at telecommunications wavelengths on silicon. Their work could advance...
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April 2024
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