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Light Sources News
New Rules Reveal How an Object’s Scale Affects Its Interaction with Light
PRINCETON, N.J., Jan. 14, 2020 — Princeton researchers have uncovered rules pertaining to how objects absorb and emit light. Their discovery addresses how the scale of an object affects the way it interacts with light. The new rules will tell scientists how much infrared (IR) light an object of any scale can be expected to absorb or emit. The movement of light through ordinary-size objects can be described in terms of straight lines, or rays. However, in microscopic objects, properties in the lightwave override the
Deep Learning Speeds 3D Microscopic Neuroimaging
AUSTIN, Texas, and SAN DIEGO, Jan. 14, 2020 — Using deep learning techniques, researchers from the Salk Institute have developed a new microscopy approach that could make microscopic techniques used for brain imaging 16 times faster. The researchers trained their deep learning system using data...
LED Lighting Provides Energy Efficiency, But Needs Standards
NEW BRUNSWICK, N.J., Jan. 14, 2020 — With the growing popularity of LED lighting, scientists are looking to study its effects on plant growth. However, a lack of standards has made studies unreliable. While LED lighting can enhance plant growth in greenhouses, standards are needed to...
Using Microwave Metamaterials in Machine Learning Speeds Object Recognition
DURHAM, N.C., Jan. 13, 2020 — A new approach to object identification, developed by researchers at Duke University and the Institut de Physique de Nice (INPHYNI), enables joint learning of optimal measurement strategies and a matching processing algorithm, and uses inferred...
Microresonator Measures and Images Nanoparticles with High Degree of Sensitivity
ONNA, Japan, Jan. 13, 2020 — Scientists at the Okinawa Institute of Science and Technology (OIST) Graduate University have developed a light-based device that can act as a biosensor, detecting biological substances in materials, such as harmful pathogens in food. The scientists...
Active Thermal Detection Could Broaden Use of Superresolution Techniques
DAEJEON, South Korea, Jan. 10, 2020 — Be it light, sound, or an electromagnetic wave, a probe beam operates the same way — the beam gets sent ahead and a wave of the same nature is reflected back. The absorbed energy is converted to heat, for which there has been no perceived use...
NIST Proposes New Definition for Optical Watt
GAITHERSBURG, Md., Jan. 9, 2020 — Researchers at the National Institute of Standards and Technology (NIST) seek to develop a more precise definition for the standard unit of light power, the optical watt. Instead of the current definition, which is based on comparisons to electrical...
Field Tests Measuring Solar Panel Performance Could Help Improve PV Technology
MÜLHEIM AN DER RUHR, Germany, Jan. 9, 2020 — In a series of field tests performed at the Max Planck Institute for Chemical Energy Conversion (MPI-CEC), key parameters in solar panel performance were measured to gather data that can be used for choosing the most appropriate panel option for...
2-Photon Microscopy Shows Learning Involves Various Areas of Brain
BALTIMORE, Jan. 8, 2020 — To explore how learning and memory-building take place in the brain, scientists at Johns Hopkins University School of Medicine used a laser-assisted imaging tool to monitor and measure levels of AMPAR molecules, which help send messages between...
Laser Pulse Creates Nonlinear Effects in Amorphous Dielectric Material
ATLANTA, Jan. 8, 2020 — A new, all-optical technique for creating second-order nonlinear effects in materials that normally do not support them could lead to new options for creating these effects for optical computers, high-speed data processors, and bioimaging. A...
Quantum Dots Deliver Vaccines, Encode Vaccination History in the Skin
CAMBRIDGE, Mass., Jan. 7, 2020 — Using fluorescent quantum dots, an MIT research team has created a way to administer vaccinations and record a patient’s vaccination history in the skin. The researchers developed a microneedle platform that can selectively deliver...
Osram, Rinspeed to Debut Modular Electric Vehicle at CES 2020
LAS VEGAS, Jan. 6, 2020 — Osram Opto Semiconductors Inc., a global high-tech lighting company, announced it is the exclusive lighting supplier for Rinspeed’s concept vehicle, MetroSnap, debuting at CES 2020. This is the fourth consecutive year that Osram has supported...
Ghost Imaging Speeds Up Superresolution Microscopy
SHANGHAI, Jan. 6, 2020 — Scientists from the Chinese Academy of Sciences have developed a new imaging technique that produces nm-scale resolution using significantly fewer images than traditional nanoscopy techniques. The scientists used ghost imaging to enhance the imaging...
National University of Singapore Develops Large-Area, Flexible NIR LEDs
SINGAPORE, Dec. 30, 2019 — A research team led by Tan Zhi Kuang from the Department of Chemistry and the Solar Energy Research Institute of Singapore (SERIS) has developed high-efficiency, near-infrared LEDs that can cover an area of 900 mm2 using low-cost solution-processing...
In Vivo Imaging with FLIM Shows Effect of Experience on Neuronal Activity
JUPITER, Fla., Dec. 30, 2019 — Every day, the neuronal connections within our brains change depending on what we learn and experience in our daily lives. Specialized proteins, called activity-dependent transcription factors, activate genes within the cells of the brain to help it...
Researchers Find Way to Supercharge Protein Production
ST. LOUIS, Dec. 27, 2019 — Even though scientists have engineered bacteria to make therapeutic proteins, medicines based on these proteins, such as insulin and clotting factors for hemophilia, are still difficult to synthesize in the lab. Now, through the use of green...
Researchers Transform IR Wavelengths into Visible Light
College Park, Md., Dec. 25, 2019 — Researchers have designed a new chip-integrated light source that can transform infrared wavelengths into visible wavelengths, which have been difficult to produce with technology based on silicon chips. This flexible approach to on-chip light...
Metasurface with Space-Time Phase Modulation Demonstrates Nonreciprocal Light Reflection
STATE COLLEGE, Pa., Dec. 23, 2019 — Scientists at The Pennsylvania State University (Penn State) developed a new type of optical metasurface that makes light reflect in one direction only. Leveraging both spatial and temporal phase manipulation provided by an ultrathin nonlinear...
Ultrafast, Energy-Efficient All-Optical Switching with Plasmonic Waveguides
TOKYO, Dec. 20, 2019 — NTT and the Tokyo Institute of Technology (Tokyo Tech) have developed an all-optical switch that operates in the ultrafast regime with a response time in the femtosecond (fs) range and with energy consumption in the femtojoule (fJ) range. To achieve...
Researchers Aim to Build Light-Controlled Tissue Scaffolds for Cell Regeneration
AARHUS, Denmark, Dec. 19, 2019 — Researchers at Aarhus University are exploring a method of regenerating brain and heart cells using light. Their technique uses water-based nanofibers coated with organic photovoltaic nanomaterials to create light-controlled neural-stimulating...
Coating Made from Quantum Material Conceals Temperature Change from IR Cameras
MADISON, Wis., Dec. 19, 2019 — An ultrathin coating engineered from samarium nickel oxide (SmNiO3) has been found to emit the same amount of thermal radiation irrespective of temperature, within a range of about 30 °C. The coating, which was developed by engineers at the...
Photoacoustic Microscopy System Improves SNR, Resolution
POHANG, South Korea, Dec. 17, 2019 — A superresolution localization photoacoustic microscopy (PAM) technique has been developed by a team at Pohang University of Science and Technology (POSTECH). The new system can monitor the flow of red blood cells without using a contrast absorber,...
Machine Learning Predicts How to Develop High-Performing Solar Cells
ORLANDO, Fla., Dec. 17, 2019 — To determine the best way to optimize the materials used to build perovskite solar cells, a research team at the University of Central Florida turned to machine learning techniques. The researchers reviewed more than 2000 peer-reviewed publications...
Fiber Optic-Based Sensor Measures pH Levels in Cell-Growth Environments
GAITHERSBURG, Md., Dec. 16, 2019 — Scientists at the National Institute of Standards and Technology (NIST) are developing a photonic sensor to study tissue growth in the lab. The proof-of-concept sensor uses a light-based signal to measure pH, an important property in cell-growth...
Higher-Order Topological States Could Lead to Faster Data Transfer
NEW YORK, Dec. 13, 2019 — Research into topological photonic metamaterials, led by City College of New York, shows that long-range interactions in metamaterials can change the behavior of lightwaves, forcing the waves to localize in space. The study further shows that by...
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August 2024
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