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Light Sources News
Visible-Light-Activated Prodrug Can Combat Chemo’s Side Effects
HONG KONG, Oct. 4, 2019 — Many antitumor drugs used in chemotherapy move around in the patient’s blood after intake. Healthy cells may be killed along with tumor cells, causing undesirable side effects. To avert potential “collateral damage” caused by antitumor drugs, a research team at City University of Hong Kong (CityU) has developed a small-molecule platinum(IV) anticancer prodrug called phorbiplatin. Phorbiplatin is shown to be inert in the dark, but it can be controllably activated under low-power red-light...
Hybrid LED Could Power Li-Fi, Electrically Driven Lasers
NEW YORK, Oct. 3, 2019 — A City College of New York (CUNY) research team has demonstrated an LED based on half-light, half-matter quasiparticles in atomically thin materials. The device was fabricated using stacks of atomically thin semiconductor materials embedded in an...
Using Light to Optically Regulate Cell Fate for Regenerative Medicine
MILAN, Italy, Oct. 3, 2019 — Researchers at Istituto Italiano di Tecnologia (IIT) have shown proof of principle that optical modulation can be exploited to directly control the fate of a progenitor cell population to facilitate the formation of new blood vessels. The...
Crop Stress Managed with Machine Learning, UAVs, Hyperspectral Imaging
AMES, Iowa, Oct. 1, 2019 — Iowa State University scientists are developing a machine learning system that could automate farmers’ ability to diagnose a range of major stressors in soybeans. The technology will use cameras attached to unmanned aerial vehicles (UAVs) to gather...
Spectroscopy Technique Widens Spectra for Measuring Molecular Structure
TOKYO, Sept. 27, 2019 — Researchers at the University of Tokyo have combined two current spectroscopy techniques — infrared (IR) absorption and Raman scattering spectrometry — to create complementary vibrational spectroscopy. The new technique employs IR absorption and...
Machine Learning Speeds Metamaterial Design for Thermophotovoltaic Devices
DURHAM, N.C., Sept. 26, 2019 — A Duke University engineering team has used machine learning to design dielectric metamaterials that absorb and emit specific frequencies of terahertz (THz) radiation. Use of machine learning made it possible to calculate design requirements for the...
Light-Activated Hybrid Bots Drive Muscle Activity Through Nerve Cells
CHAMPAIGN, Ill., Sept. 25, 2019 — Researchers from the University of Illinois at Urbana-Champaign have developed soft, microscopic, swimming biohybrid robots powered by skeletal muscle tissue that is stimulated by onboard motor neurons. The neurons have optogenetic properties...
High-Performance Organic Photovoltaic Cells Developed for Indoor Use
LINKÖPING, Sweden, Sept. 25, 2019 — Scientists from Linköping University, the Chinese Academy of Sciences, and the University of Science and Technology Beijing have developed organic solar cells that can convert ambient indoor light to electricity. Although the power produced by...
Using Green Light to Synthesize Organic Compounds
YOKOHAMA, Japan, Sept. 23, 2019 — A team from Yokohama National University has developed oxygen heterocycles using green light as a photocatalyst. Their sustainable approach to developing these compounds could help organic chemists develop better drugs. Oxygen heterocycles are ring...
Optical Clock Uses Laser Tweezers to Manipulate Atoms
BOULDER, Colo., Sept. 20, 2019 — JILA physicists have demonstrated a new atomic clock design that uses laser tweezers to trap, control, and isolate atoms. The tweezers are created by an IR laser beam aimed through a microscope. The beam is deflected to create 10 spots of light for...
Sensor Detects Buried Objects from Moving Vehicle
OXFORD, Miss., Sept. 17, 2019 — A new laser-based sensor, developed by a team at the University of Mississippi, can detect buried objects such as land mines even while the detector is in motion. The new device, called a Laser Multi Beam Differential Interferometric Sensor...
Single-Molecule Localization Microscopy Approach Improves Precision
BEIJING, Sept. 17, 2019 — An interferometric, single-molecule localization method for superresolution fluorescence microscopy, developed by scientists at the Institute of Biophysics of the Chinese Academy of Sciences, could significantly improve localization precision...
Compressive Sensing Techniques Speed 2-Photon Microscopy
HONG KONG, Sept. 16, 2019 — To enhance the imaging speed of two-photon microscopy without compromising resolution, researchers from The Chinese University of Hong Kong combined compressive imaging techniques with a multifocus laser illumination method that uses a digital...
Device Generates Renewable Electricity from Cold Night Sky
LOS ANGELES and PALO ALTO, Calif., Sept. 13, 2019 — An inexpensive thermoelectric device demonstrated the ability to power an LED at night by harnessing the cold of space to generate electricity. Such a device could be used for power generation in remote locations and to produce renewable electricity...
2-Level Optogenetic Device Could Broaden Options for Large-Mammal Studies
GLASGOW, Scotland, and SALT LAKE CITY, Sept. 13, 2019 — An implantable optrode array, developed by researchers at the University of Strathclyde and the University of Utah, is capable of exciting below-surface neurons in large mammal brains both by structured-light delivery and by large-volume...
NIST Automates and Upgrades Its LED Photometry Lab
GAITHERSBURG, Md., Sept. 11, 2019 — The National Institute of Standards and Technology (NIST) has improved the accuracy and speed of its calibration service for assessing the brightness of LED lamps and other solid-state lighting products. Customers for this service include LED lamp...
Mathematical Model Based on Maxwell’s Equations Leads to Discovery of New Lightwave
EDINBURGH, Scotland, Sept. 9, 2019 — Equations developed by physicist James Clerk Maxwell have helped to reveal how crystals can be manipulated to produce a distinctive form of lightwave. Researchers from the University of Edinburgh and Pennsylvania State University made the discovery...
Single-Nanowire Spectrometer Works Separately from Components
CAMBRIDGE, England, Sept. 9, 2019 — Scientists at the University of Cambridge have developed a microspectrometer based on a single, compositionally engineered nanowire that is independent of the complex optical components or cavities that tend to constrain further miniaturization of...
Tip-Enhanced Raman Spectroscopy Provides 1-nm Resolution
BERLIN, Sept. 6, 2019 — Tip-enhanced resonance Raman spectroscopy (TERRS) has been demonstrated by a research team at Fritz-Haber Institute. The results suggest that TERRS could offer a new approach for the atomic-scale optical characterization of local electronic states....
MWIR Laser Enables Study of High-Explosive Detonations
TUCSON, Ariz., and RICHLAND, Wash., Sept. 5, 2019 — Scientists at the University of Arizona and Pacific Northwest National Laboratories used a broadly tunable swept-wavelength external cavity quantum cascade laser (swept-ECQCL) operating in the midwave infrared (MWIR) spectral region to measure...
Differential Detection Improves Accuracy in Diffractive Optical Neural Networks
LOS ANGELES, Sept. 4, 2019 — Improvements to an optical neural network being designed at the University of California, Los Angeles (UCLA) take advantage of the parallelization and scalability of optical-based computational systems. The system uses a series of 3D-printed layers...
Injected Nanoparticles Could Enable Sight Beyond Visible Spectrum
WORCESTER, Mass., Sept. 3, 2019 — No mammalian photoreceptor can effectively detect light that exceeds 700 nm, and mammals are unable to see near-infrared (NIR) light or to project a NIR image to the brain. To enable the detection of longer wavelength light in mammals, scientists at...
Quantum Entanglement Sent Over 50 Km of Optical Fiber
INNSBRUCK, Austria, Aug. 30, 2019 — A team from the University of Innsbruck and the Institute of Quantum Optics and Quantum Information of the Austrian Academy of Sciences has achieved what could be a record for the transfer of quantum entanglement between matter (a trapped ion) and...
Computational Imaging Tools Improve Lateral OCT Resolution
DURHAM, N.C., Aug. 30, 2019 — A new technique called optical coherence refraction tomography (OCRT) is able to increase the resolution of OCT down to a single micrometer in all directions, even in a living patient.
Welding with Pulsed Lasers Protects Temperature-Sensitive Materials
LA JOLLA, Calif., Aug. 29, 2019 — A new ceramic welding technology developed by engineers at the University of California, San Diego and the University of California, Riverside uses a series of short, ultrafast laser pulses to melt ceramic materials along the interface between two...
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