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Light Sources News
Structural Color Gives Sustainable Sparkle to Plant-Based Materials
CAMBRIDGE, England, Nov. 26, 2021 — Not all that glitters is gold and not all that’s glitter is good for the environment. Used to add sparkle to everything from cosmetics to Christmas ornaments, glitter is getting an environmentally friendly makeover from scientists at the University of Cambridge. The researchers are developing biodegradable glitter made from plant-based, structurally colored cellulose materials. It has all the sparkle found in conventional glitter but none of the toxic materials, and it is for consumer
Algorithm Delivers Perceptual Reality to Holographic Displays
STANFORD, Calif., Nov 23, 2021 — Research at Stanford University may lead to more realistic displays in virtual and augmented reality headsets. A team at the school has developed a technique to reduce a speckling distortion often seen in regular laser-based holographic displays, as...
Squeezed Light Improves Accuracy of Magnetometry Measurements
BARCELONA, Spain, Nov. 22, 2021 — Researchers from ICFO (The Institute of Photonic Sciences) and Hangzhou Dianzi University have revealed that the effect known as “squeezed light” — the organization of photons in motion that ensures that they arrive on a target in...
Foveated Glasses-Free 3D Display Achieves High Angular Resolution with Wide FOV
SUZHOU, China, Nov. 9, 2021 — Glasses-free 3D displays could transform the portable electronics industry. However, the limited resolution of display panels in existing 3D displays compromises spatial and angular resolution as well as viewing angle capabilities. An approach to 3D...
Laser Ophthalmoscopy Provides Full Picture of Eye Disease
TOKYO, Nov. 9, 2021 — For retinal diseases such as diabetic retinopathy (DR), which affect a wide area of the fundus, the interior surface at the back of the eye, it is important for clinicians to be able to examine a broad area of the eye in a single shot. A research...
Interferometry reveals 'social behavior' of Photons
ENSCHEDE, Netherlands, Oct. 28, 2021 — The photon is one of the particle types, called bosons, that is able to form a Bose-Einstein condensate. The ability of photons to condense in the state known as a Bose-Einstein condensate is how liquid light is derived. To understand the physical...
Seeing Red: InGaN Microdisplay Sharpens AR Glasses
CAMBRIDGE, England, Oct. 25, 2021 — A microdisplay developed by University of Cambridge spinout Porotech is expected to accelerate the development and commercialization of augmented reality glasses. The company reports that the microdisplay is the first based on native red indium...
Fluorescent Sensors with Noncanonical Amino Acids Could Broaden Sensor Use in Biological Studies
PHOENIX, Oct. 21, 2021 — Although fluorescence tools for biological study abound, some processes, such as the interactions between proteins and metabolites, are challenging to investigate with the tools that currently exist. However, a research group led by professor Jeremy...
Monolithic Integrated Platform Supports Silicon Photonics
HONG KONG, Oct. 21, 2021 — Photonic chip platforms indium phosphide (InP) and silicon (Si) offer distinct advantages for photonic integrated circuits (PICs). To synergize the capabilities of the two platforms, researchers at Hong Kong University of Science and Technology...
Raman Spectroscopy and Machine Learning Team Up to Predict Immunotherapy Response in Patients
BALTIMORE, Oct. 21, 2021 — Using Raman spectroscopy and machine learning, a team at Johns Hopkins University developed a noninvasive technique to assess how cancer patients will respond to immunotherapy. The researchers used Raman spectroscopy to map the biochemical...
Continuous-Wave OPA Supports Noise-Reduced Chip-Scale Optical Signal Processing
GOTHENBURG, Sweden, Oct. 8, 2021 — An optical amplifier developed at Chalmers University of Technology is poised to radically improve optical communications performance. The compact amplifier is designed to fit on a chip and amplify light without generating excess noise. Light-based...
Laser Process Prints Defect-free Custom Alloy Parts
COLLEGE STATION, Texas, Oct. 6, 2021 — A study from a Texas A&M University research team could make it easier to print uniform, defect-free parts using the laser bed powder fusion 3D-printing technique with metal alloys. The researchers systematically investigated the effects of...
Photonic Chip Combines Many VCSELs into Single Laser
WÜRZBURG, Germany, Sept. 30, 2021 — Researchers from the Technion-Israel Institute of Technology and the University of Würzburg successfully forced an array of vertical-cavity lasers to act together as a single laser — a highly effective laser network the size of a grain of...
Promising Materials Emerge for Next-Gen LED-Based Data Communications
GUILDFORD, England, Sept. 10, 2021 — A team of researchers has examined how organic semiconductors, colloidal quantum dots (CQDs), and metal halide perovskites can be used in high-speed LED-based optical communication systems. LED-based techniques enable computing devices to...
NIR Spectroscopy Could Provide Window into AD Pathology, Therapeutics
BEDFORD, Mass., Sept. 1, 2021 — To detect Alzheimer’s disease (AD) in its early stages, researchers at the VA Bedford and VA Boston Healthcare systems developed a noninvasive optical technique that uses near-infrared spectroscopy to identify changes in the brain by capturing...
Applications for Portable Optical Gas Analyzer Range from Volcanos to Sewers
HAMAMATSU, Japan, Aug. 25, 2021 — Hamamatsu Photonics and the National Institute of Advanced Industrial Science and Technology (AIST) in Tokyo collaborated on an all-optical, portable gas monitoring system for predicting volcanic eruptions with a high degree of sensitivity. In...
Photonic Security System's Holograms Prevent Forgery
POHANG, South Korea, Aug. 23, 2021 — Forgeries could become next to impossible with a two-level encrypted holographic security device, built by researchers at Pohang University of Science and Technology (POSTECH). The platform for the technology is a bifunctional, pixelated metasurface...
Photoacoustic Imaging Technique Detects Arterial Plaques
EAST LANSING, Mich., Aug. 19, 2021 — Researchers at Michigan State University (MSU) used light-activated nanoparticles and photoimaging to locate and image cells found in the arteries, cells that could lead to heart attacks and strokes. MSU professor Bryan Smith and his team worked...
Chromium Complex Emits Light in the Coveted NIR-II Range
BASEL, Switzerland, Aug. 17, 2021 — A team of Swiss scientists has developed the first chromium complex that emits light in the NIR-II (1000 to 1700 nm) range. The scientists achieved an NIR-II luminescence of 1067 nm by strengthening the metal-ligand bond covalence in the complex....
Luminescent Manganese Complexes Show Promise for Sustainable Displays
BASEL, Switzerland, Aug. 17, 2021 — In their quest to produce more-sustainable luminescent materials and catalysts for the conversion of sunlight into other forms of energy, University of Basel researchers have developed a class of compounds based on manganese. The metal is more...
Smart Device-Enabled Optical Breathalyzer Checks Blood Alcohol Levels
QUEBEC CITY, Aug. 11, 2021 — Researchers at Laval University are developing an optical breathalyzer that can be integrated into the screen of a mobile device. This technology could provide an accessible, inexpensive way to check blood alcohol content (BAC) and reduce...
Photonics Shapes the Worlds of Augmented and Virtual Reality
Aug 6, 2021 — Replacing smartphones with smart glasses isn’t practical … yet. In the meantime, advancements in photonics are helping to expand the use of smart glasses in educational, medical, military, and industrial settings. According to technologists and end...
Photothermal Process Irradiates Nanoparticles to Control Cell Activity
ST. LOUIS, Aug. 2, 2021 — Using nanoparticles as photothermal nanotransducers, scientists at Washington University in St. Louis demonstrated reversible modulation of electrical activity in excitable nerve and heart muscle cells. The biocompatible, minimally invasive approach...
Custom Near-Field Nanoscopy Tool Images Materials at Nanoscale
CAMBRIDGE, Mass., July 28, 2021 — A near-field infrared (IR) nanoscope and spectroscope, custom built by a research team at MIT, can quickly and economically probe the characteristics of diverse materials at the nanoscale. Also known as a scattering-type scanning near-field optical...
On-Demand Optical Singularities Strengthen Range of Applications
CAMBRIDGE, Mass., July 26, 2021 — A group led by Federico Capasso at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) has broadened the study of optical singularities to include to zero-dimensional (point) and 2D (sheet) optical singularities. The group...
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August 2024
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