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Light Sources News
Graphene Composite Improves Photocatalytic Activity Used to Degrade Pollutants
BERGAMO, Italy, Dec. 13, 2019 — Graphene Flagship partners developed a graphene-titania composite via a one-step procedure to widen and improve the applicability of “smog-eating” cement. The prepared composite showed enhanced photocatalytic activity, degrading up to 40% more pollutants than pristine titania in the model study, and up to 70% more pollutants in the case of nitrogen oxides (NOx). Organic pollutants, such as (NOx) and volatile compounds, are emitted mostly by vehicle exhausts and industry and are the
New Laser Technique Captures Dynamic Processes of Quantum Materials
VANCOUVER, B.C., Dec. 11, 2019 — A new extreme-ultraviolet (UV) laser source, developed at the University of British Columbia (UBC), enables time-resolved photoemission spectroscopy, a technique for visualizing electron scattering processes at ultrafast timescales. Photoemission...
Squeezing Improves LIGO’s Sensitivity to Quantum Noise
CAMBRIDGE, Mass., Dec. 10, 2019 — A new instrument called a quantum vacuum squeezer is helping LIGO — the Laser Interferometer Gravitational-Wave Observatory — to detect gravitational wave signals nearly every week. Just a year ago, LIGO was picking up gravitational...
Nontoxic Material Used to Upconvert Low-energy Photons
RIVERSIDE, Calif., Dec. 6, 2019 — Researchers at the University of California, Riverside (UC Riverside) and the University of Texas at Austin demonstrated the use of nontoxic silicon nanocrystals to convert low-energy photons into high-energy ones. The use of nontoxic materials for...
Electric field-induced Charging Could Improve Colloidal Quantum Dot Lasing
SINGAPORE, Dec. 5, 2019 — Researchers at Nanyang Technological University (NTU Singapore) have demonstrated tunable, controllable amplified spontaneous emission (ASE) in a colloidal semiconductor device via electric field-induced charging. Their work could open new avenues...
Plasmonics-Based Light Detector Could Support Precision Agriculture
DURHAM, N.C., Nov. 27, 2019 — A new, broad-spectrum photodetector that can be implemented on a single chip has been developed at Duke University. The photodetector spans a range of light frequencies by using on-chip spectral filters created with electromagnetic materials. The...
Tapered Optical Fiber Performs Multisite Photometry in the Brain
LECCE, Italy, Nov. 26, 2019 — Researchers from Istituto Italiano di Tecnologia (IIT), the University of Salento, and Harvard Medical School have developed a light-based method to capture and pinpoint neural activity in the brain. The new method allows signals from various brain...
Electrode-Water Interface Produces Giant Pockels Effect for a ‘Liquid’ Light Modulator
TOKYO, Nov. 25, 2019 — A new type of light modulator could lead to a better understanding of how the Pockels effect occurs in different types of materials, making it possible to more fully explore its potential in optical applications. A team of scientists at the Tokyo...
Smart Microscope Teaches Itself Settings for Diagnosing Disease
DURHAM, N.C., Nov. 25, 2019 — Engineers at Duke University used machine learning to develop a microscope capable of adapting its lighting angles, colors, and patterns while teaching itself the optimal settings needed to complete a diagnostic task. In a proof-of-concept study,...
Collaborative Work Advances Quantum Sensors for Bio Applications
ROME, Nov. 25, 2019 — A research team at Università degli Studi Roma Tre has shown that quantum light can be used to track enzyme reactions in real time. The researchers developed a setup that allowed them to control the light at the level of a single photon. This made...
The Relightables System Captures Character Lighting for Virtually Any Environment
MOUNTAIN VIEW, Calif., Nov. 21, 2019 — Computer scientists at Google have developed a system for high-quality, relightable performance capture. The volumetric capture system, called The Relightables, can capture full-body reflectance of 3D human performances and seamlessly blend them...
Photonic Accelerator Could Increase Computation Speed and Efficiency
HAMAMATSU, Japan, Nov. 19, 2019 — A new photonic integrated circuit device, developed by researchers in Japan, can be placed at the front end of a digital computer and optimized to perform specific functions with less power consumption than is needed for fully electronic devices....
Photonic Cluster States Generated at Room Temps for Quantum Computation
KONGENS LYNGBY, Denmark, Nov. 18, 2019 — To observe quantum phenomena on a macroscopic scale, researchers at the Center for Macroscopic Quantum States (bigQ) and the Technical University of Denmark (DTU) created an extremely entangled quantum state, called a cluster state. The team’s...
Ghost Imaging Captures Clear Reconstructions of Moving Objects
CHANGSHA, China, Nov. 18, 2019 — Researchers at the National University of Defense Technology (NUDT) have used ghost imaging to capture an image of a moving object. The new method, which creates clear reconstructions by combining information found in the blurry images of a moving...
2D Material for Photodetectors Is Less Costly, More Sensitive Than Gold
PHILADELPHIA, Nov. 15, 2019 — Researchers at Drexel University are using MXene, a 2D transition metal carbide (Ti3C2), to fabricate photodetectors with improved sensitivity for substantially less cost. The researchers replaced gold, typically used in the fabrication of...
Interactive Hologram Uses Ultrasound Waves and LEDs
SUSSEX, England, Nov. 15, 2019 — Researchers at the University of Sussex have built a device that uses LEDs and ultrasound waves to levitate a polystyrene bead and create tactile, 3D holograms. The device, known as a Multimodal Acoustic Trap Display (MATD), maneuvers the 2 mm-wide...
Researchers Explore How Light Affects Circadian Rhythms in Insects
IRVINE, Calif., Nov. 14, 2019 — University of California, Irvine (UCI) researchers have explored how UV, blue, and red light affect the central brain neurons that allow circadian clock timing to be reset. The researchers found that blue and UV light create a sustained light...
Trapped Light in Anisotropic Cavities Could Lead to Optoelectronic Advancements
WARSAW, Poland, Nov. 14, 2019 — A research collaboration from Poland, the United Kingdom, and Russia has created a two-dimensional system in which they trapped photons. The system, a thin optical cavity filled with liquid crystal, was modified with an external voltage that caused...
Raman Scattering Helps Ensure Safety of Stem Cell Therapies
NEW BRUNSWICK, N.J., Nov. 12, 2019 — A research team at Rutgers University has developed a biosensor technology that could benefit applications for the treatment of neurological disorders through stem cell therapy. The hybrid biosensing platform consists of an array of ultrathin...
Optical Imager Could Help Diagnose, Treat Dry Eye Disease
LOD, Israel, Nov. 12, 2019 — A new, noninvasive optical imaging system promises to improve diagnosis and treatment for dry eye disease. Called the Tear Film Imager, the device has the ability to perform spectral measurements across a large field of view in a few seconds and can...
Photonic Crystals Show Fast Response Speeds
STATE COLLEGE, Pa., Nov. 11, 2019 — A technique to restructure liquid crystals could lead to the development of fast-responding liquid crystals suitable for next-generation displays and advanced photonic applications such as mirrorless lasers, biosensors, and fast/slow light...
Machine Learning Enhances Synchrotron Performance
BERKELEY, Calif., Nov. 11, 2019 — A team of researchers from Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California, Berkeley (UC Berkeley) have demonstrated how machine learning can improve the stability of synchrotron light beam performance....
Gigaphoton Opens New Company in China
OYAMA, Japan, Nov. 8, 2019 — Gigaphoton Inc., a manufacturer of light sources used in semiconductor lithography, has announced the establishment of its new Chinese company, Gigaphoton China Inc. Gigaphoton has operated as a laser supplier for semiconductor manufacturers since...
Commemorating 30 Years of Optical Vortices
CHANGCHUN, China, Nov. 6, 2019 — Thirty years ago, Pierre Coullet et al. proposed that a special optical field exists in laser cavities bearing some similarity with the superfluid vortex. This observation was the first indicator that optical vortices could exist. Since then,...
AI Improves Quality and Usability of Optoacoustic Imaging
ZURICH, Nov. 5, 2019 — In optoacoustics, image quality depends on the number and distribution of sensors used by the device; the more sensors and the more broadly they are arranged, the better the quality. To improve image quality in low-cost optoacoustic devices with...
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