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Research & Technology News
3D Mapping of Finger Veins Points to Uncrackable Security
BUFFALO, N.Y., Sept. 30, 2020 — An optical biometric authentication tool using photoacoustic tomography to map a subject’s finger veins in 3D could provide a nearly uncrackable security method. Researchers at SUNY Buffalo developed the biometric authentication technique. Tests showed that the method performed with 99% accuracy in accepting and/or rejecting identities. Photoacoustic finger vessel images from eight different subjects. Different colors represent different depths. Courtesy of Jun Xia, SUNY
Chemical System Collects, Stores Solar Energy on Molecule for 14 Hours
JENA, Germany, Sept. 29, 2020 — Researchers from the Leibniz Institute of Photonic Technology (Leibniz IPHT) and Friedrich Schiller University have developed a copper complex-based chemical system for molecularly storing solar energy for at least 14 hours. The system decouples...
System Captures 3D Images of Internal Defects in Solid Structures
SENDAI, Japan, Sept. 29, 2020 — A system developed by researchers at Tohoku University captures 3D images enabling the detection of defects in metallic structures. The technology, called the piezoelectric and laser ultrasonic system (PLUS), combines the strengths of two different...
Lateral Scan Technologies Spur Optical Design, Enable Microscope to Accelerate Laser Focusing Speed
DALLAS, Sept. 28, 2020 — To overcome the limitations of high-speed volumetric imaging due to slow axial scanning rates or aberrations introduced by the z-scanning mechanism, scientists at UT Southwestern have introduced a novel optical design that transforms a lateral scan...
Single Microendoscope Acquires Photoacoustic, Fluorescent Images
GRENOBLE, France, Sept. 28, 2020 — An endoscope that combines photoacoustic and fluorescence imaging and that is about as thick as a human hair could one day provide insight into the brain by enabling the simultaneous measurement of blood dynamics and neuronal activity. The...
Verifying Whisky’s Authenticity Without Spilling a Drop
ST. ANDREWS, Scotland, Sept. 25, 2020 — According to a study by the European Union’s Intellectual Property Office, counterfeit drinks cost the U.K. economy more than £200 million in lost revenue. To prevent that, researchers from the University of St. Andrews have developed a...
Controlling Ultrastrong Light-Matter Coupling at Room Temperature
GOTHENBURG, Sweden, Sept. 25, 2020 — The interaction between light and electrons in a system composed of two gold mirrors separated by a small distance and plasmonic gold nanorods produced ultrastrong coupling between light and matter at room temperature. The work stems from an...
Shaping Light-Activated Nanocatalysts
HOUSTON, Sept. 25, 2020 — A comparative study from Rice University researchers in the college’s Laboratory for Nanophotonics (LANP) demonstrated how the shape of nanoparticles affects their ability to drive light-activated reactions. The work is part of LANP’s...
‘Firefly’ Imaging Technique Sheds Light on Molecular Forces
ATLANTA, Sept. 24, 2020 — Using tools made of luminescent DNA, researchers at Emory University have visualized the mechanical forces of cells at the molecular level. The researchers demonstrated the technique on human blood platelets. “Normally, an optical microscope...
High-Spatial-Resolution Camera Achieves 15 Trillion Frames per Second
SHENZHEN, China, Sept. 24, 2020 — An all-optical ultrafast imaging system developed by scientists at Shenzhen University has reached 15 trillion frames per second. The system is useful for visualizing ultrafast phenomena such as femtosecond laser ablation, ignition for nuclear...
Flexible Parylene Waveguide Operates Over Broad Spectrum
PITTSBURGH, Sept. 23, 2020 — A parylene-based waveguide has the physical characteristics necessary to enable it to emerge as the new standard in optical biointerfaces. Researchers at Carnegie Mellon University developed the highly flexible waveguide, which can additionally...
Fisheye Metalens Captures 180 Degree Panoramic Images
CAMBRIDGE, Mass., Sept. 23, 2020 — Researchers at MIT and the University of Massachusetts Lowell have developed a wide-angle metalens capable of producing 180° panoramic images. The design could be adapted for a wide range of applications, such as in smartphones and laptops,...
Low-light Photodetector Senses Shades from UV to NIR
MELBOURNE, Australia, Sept. 23, 2020 — Researchers at RMIT University (Australia) introduced a hyper-efficient broadband photodetector capable of imaging all shades of light between the UV and near-infrared ranges and is at least 1000× thinner than existing commercially available...
Plasma Scattering Microscopy Allows Precise Imaging of Individual Proteins
TEMPE, Ariz., Sept. 22, 2020 — Researchers at Arizona State University have developed a microscopy technique that harnesses surface plasmon resonance (SPR) to enable precision imaging of individual proteins. SPR has been used to investigate the interactions of bacteria and...
Researchers Confirm Drastically Reduced Noise in Room Temperature Optical Fiber
ROCHESTER, N.Y., Sept. 22, 2020 — A hollow optical fiber developed by researchers at the University of Central Florida greatly reduces noise that interferes with transmitted signals, compared to single-mode fibers that are currently used to reduce noise. Researchers at the...
Low-Energy Light Invigorates Polymer Object Production Process
RALEIGH, N.C., Sept. 21, 2020 — Visible yellow and green light are central to a process that researchers from North Carolina State University used to produce polymer gel objects from pure monomer solutions. After dissolving zinc meso-tetraphenylporphyrin (ZnTPP) into pure monomers...
Silicon Photonics Drives Ultrasmall Ultrasound Detector
MUNICH, Sept. 18, 2020 — A base of miniaturized photonic circuits, undetectable to the human eye and assembled on top of a silicon chip, has enabled a German research team to develop an ultrasound detector they say is the smallest in existence. The detector is 100×...
Versatile Spectroscopy System Acquires Data at Exceptional Speeds Across Platforms
WASHINGTON, D.C., Sept. 18, 2020 — Electro-optic combs operating at gigahertz pulse rates have enabled a dual-comb spectrometer capable of acquiring data at exceptionally high speeds to perform linear absorption spectroscopy on gases of different pressure. Though the experiments are...
Synthetic Magnetic Field Uses Metasurfaces to Manipulate Photons
EXETER, England, Sept. 17, 2020 — Researchers at the University of Exeter have developed a way to manipulate light with a “synthetic” Lorentz force — which is responsible in nature for a number of phenomena such as the aurora borealis. The technique allows the...
Quantum Microscope Squeezes Out Noise
OAK RIDGE, Tenn., Sept. 16, 2020 — Researchers at the U.S. Department of Energy’s Oak Ridge National Laboratory (ORNL) used quantum optics to advance state-of-the-art microscopy and, in doing so, chart a a path to detecting material properties with greater sensitivity than is...
Researchers Look to Combine AI and IR Sensing to Save Lives
STANFORD, Calif., Sept. 16, 2020 — Researchers at Stanford University are looking at AI and infrared sensing to save lives in smart hospitals and at-home care, specifically in a study that looks at 170 scientific papers to gather information on the field of “ambient...
Lidar System Delivers Vision Through Clouds and Fog
STANFORD, Calif., Sept. 15, 2020 — Using a single-photon avalanche diode that can detect the arrival times of photons down to a single photon, with precision in the tens of trillions of seconds, researchers at Stanford University have developed a lidar system capable of seeing...
Primary Mirror Completed for NASA’s Roman Space Telescope
GREENBELT, Md., Sept. 15, 2020 — The Nancy Grace Roman Space Telescope’s primary mirror has been completed, NASA announced. The telescope will have a field of view 100× greater than the Hubble Space Telescope, and it will use infrared light to study hidden structures....
Microwave Photonic Filters Reconfigured Without an External Device
LAUSANNE, Switzerland, Sept. 14, 2020 — Researchers from École Polytechnique Fédérale de Lausanne’s (EPFL) have developed a method of reconfiguring microwave photonic filters without the need for an external device. The research may enable more compact,...
OCT Offers High Speed, Strong Resolution in Retinal Imaging
SEATTLE, Sept. 14, 2020 — Researchers at the University of Washington have modified the standard process of OCT (optical coherence tomography) to detect minute changes in response to light in individual photoreceptors in the living eye. The technique has potential in the...
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