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Research & Technology News
Laser-Based Ultrasound Finds Defects in Metal 3D Printing
LIVERMORE, Calif., May 2, 2022 — Researchers at Lawrence Livermore National Laboratory (LLNL) have developed an all-optical ultrasound technique capable of performing on-demand characterization of melt tracks and detecting formation of defects in the laser powder bed fusion (LPBF) metal 3D-printing process. The team proposed a diagnostic using surface acoustic waves (SAW), generated by laser-based ultrasound, that can reveal tiny surface and subsurface defects in LPBF metal 3D printing. The team reported that its
Noninvasive Imaging Method Measures Below the Diffraction Limit
WASHINGTON, D.C., April 29, 2022 — A label-free microscopy technique developed by researchers at the University of Graz enables noninvasive, sub-diffraction-limit imaging of nanostructures. The all-linear, optical far-field measurement and imaging technique measures the position and...
Remote Sensing, Neural Networks Combine to Measure Tree Height
ZURICH, April 29, 2022 — Scientists at ETH Zurich’s EcoVision Lab have developed a deep learning framework to map treetop height globally at high resolution, using publicly available optical satellite images as input. The Global Canopy Height Map is the first map of...
Hyperspectral Method Adds Speed, Accuracy to Wafer Inspection
SEOUL, South Korea, April 26, 2022 — A high-throughput metrology technique for semiconductor manufacturing, developed by Samsung Electronics, combines spectroscopy and imaging to measure in-cell uniformity (ICU) and in-wafer uniformity (IWU) of semiconductor devices used in high-volume...
Light-Driven Microdrones Offer Nanosensing, Motion Possibilities
WÜRZBURG, Germany, April 26, 2022 — Physicists at the University of Würzburg have used light to propel micrometer-size objects in an aqueous environment and control them precisely on a surface with all three degrees of freedom — two translational degrees and a rotational...
Microsize Molecular Machines Swarm for Drug Delivery
SAPPORO, Japan, April 25, 2022 — Scientists at Hokkaido University demonstrated light-manipulated microsize molecular machines, or robots, that performed cargo delivery through a swarming strategy to ultimately achieve a transport efficiency 5× greater than that of single...
Scattering Phenomenon Could Improve Optical Communications
GAITHERSBURG, Md., April 25, 2022 — A phenomenon observed in a miniature light-scattering system composed of an ultrathin layer of silicon nitride on a chip could lead to improved optical communications and sensors. Researchers at the National Institute of Standards and Technology...
Safe, Ingestible Fluorescent Silk Tags Authenticate Medications
WEST LAFAYETTE, Ind., April 22, 2022 — To help block the flow of counterfeit medications, researchers at Purdue University and the National Institute of Agricultural Sciences in South Korea developed edible fluorescent tags that can be coded and added to pills or liquid medicine. Each...
Glass-in-glass Fabrication Method Produces Complex Optics
WASHINGTON, D.C., April 21, 2022 — A manufacturing technique for creating microstructures by integrating two types of glass with different physical properties could provide a path to complex infrared (IR) optics to be used in spectroscopy, imaging, sensing, and other applications....
Rotating Laser Enables Faster, Longer Imaging of Cells
FREIBURG, Germany, April 20, 2022 — A microscopy method developed at the University of Freiburg is able to resolve cellular-level detail without fluorescence, enabling observations 100 to 1000× longer and 10 to 100× times faster, with almost double the resolution. The...
Laser-irradiated Coating Augments Nonsurgical Treatment of Obesity
WASHINGTON, D.C., April 19, 2022 — A multi-institutional research team in South Korea has enhanced the existing functionality of appetite-suppressing implants in the stomach with photodynamic therapy, coating such an implant with light-activated dye that kills cells that produce...
Lithography Technique Precisely Controls Nanodevice Feature Sizes
HONG KONG, April 19, 2022 — Researchers at the University of Hong Kong (HKU) developed an approach for nanodevice fabrication to increase the efficiency of building nanostructures that require spatially different dimensions. The researchers devised and demonstrated a...
European Initiatives Increase Access to Quantum Magnetometers
FREIBURG, Germany, April 18, 2021 — Researchers from six Fraunhofer institutes are working on two projects that aim to make quantum magnetometers — sensor devices that measure magnetic field — usable in industrial settings. Magnetometers are currently limited in such...
Integrated Laser on Lithium Niobate Chip to Spur Advanced Telecom
CAMBRIDGE, Mass., April 15, 2022 — In collaboration with industry partners at Freedom Photonics and HyperLight Corp., researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) developed what the collaborators said is the first fully integrated...
Microfluidics Device 3D-Printing Innovates Biomedical Fabrication
PASADENA, Calif., April 14, 2022 — Researchers at the University of Southern California (USC) developed a printing technique that could provide the precision required to successfully 3D-print microfluidic channels on chips at a scale not previously seen. The technique is called in...
Protein-induced Apoptosis in Cancer Cells Protects Healthy Tissue
OKAYAMA, Japan, April 13, 2022 — A research group at Okayama University is working on a way to prevent healthy cells from incurring damage during cancer treatment. The group is developing a light-induced method for triggering cell apoptosis in targeted cells only, using a...
Deep-UV Aluminum Gallium Nitride Laser Enables Diverse Applications
ITHACA, N.Y., April 12, 2022 — Researchers at Cornell University demonstrated an optically pumped, aluminum gallium nitride (AlGaN)-based multimode laser that emits deep-ultraviolet (DUV) light at low modal linewidths and at wavelengths under 300 nm. DUV emitters have use in...
Microscope Marks Head-Mounted Advance Toward Treating Neurological Disorders
WASHINGTON, D.C., April 8, 2022 — Researchers from the University of Colorado Boulder, the University of Colorado Anschutz Medical Campus, and Arizona State University have developed a head-mounted, lightweight, fluorescence microscope that provides full 3D imaging and enhanced...
3D Printing Could Disrupt Status Quo of Optical Fiber Fabrication
HARBIN, China, April 7, 2022 — Researchers at Harbin Engineering University and the University of New South Wales demonstrated the additive manufacture of silica optical fiber preforms. According to the research team, additive manufacturing, also known as 3D printing, could...
Scaling Law Enables Optical Control of Material Properties
KYOTO, Japan, April 7, 2022 — Researchers from Kyoto University and Kurume Institute of Technology have discovered a scaling law that determines high-order harmonic generation in the solid-layered perovskite material, Ca2RuO4. The work could enable scientists to control material...
Microlaser Achieves Optical Gain Via Spin-Helix Lasing
WARSAW, Poland, April 6, 2022 — A microlaser that is tunable in the range of 40 nm has been developed by researchers at the University of Warsaw, the Military University of Technology in Warsaw, and the University of Southampton. The broadly tunable laser emits two circularly...
Photon Source Opens Door to Practical Quantum Key Distribution
SYDNEY, April 5, 2022 — Researchers have developed a new high-purity single-photon source that can operate at room temperature. The source marks an important step toward practical applications of quantum technology, such as highly secure communication based on quantum key...
Metasurface Tech Enables Polarization Imaging on Almost Any Camera
CAMBRIDGE, Mass., April 4, 2022 — Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a metasurface attachment that can turn almost any camera or imaging system, even off-the-shelf systems, into polarization cameras. The...
Nonlinear Response in Diamond Defects Could Enable Nanosensors
TSUKUBA, Japan, April 1, 2022 — A nonlinear optical approach to temperature sensing, discovered by scientists at the University of Tsukuba and the Japan Advanced Institute of Science and Technology (JAIST), could expedite development of nanosize sensors for applications that...
Integrated Photonics-Based Memristor Could Link AI, Quantum Computing
VIENNA, March 31, 2022 — By developing a photonic quantum memristor, researchers at the University of Vienna, the National Research Council (CNR), and the Polytechnic University of Milan may have found a way to link artificial intelligence (AI) and quantum computing. The...
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July 2024
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