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Light Sources News
Semiconductor Homostructures Could Improve LED Design
MOSCOW, April 23, 2019 — Researchers from the Moscow Institute of Physics and Technology (MIPT) have found that superinjection, an effect previously believed to be possible only in semiconductor heterostructures, can also occur in homostructures, that is, in structures made of a single semiconductor material. The researchers further found that most of the known semiconductors can be used to build homostructures that are capable of superinjection. Their discovery could lead to new approaches in the development and
Photon Sieve Used to Display Holographic Images with Wide Viewing Angle
DAEJEON, South Korea, April 22, 2019 — Researchers at the Korea Advanced Institute of Science and Technology (KAIST) have designed an ultrathin display that can project dynamic, multicolored holographic images with a wide viewing angle. Key to the new approach is its use of an...
Ancient Material Shows High Degree of Birefringence for Use in Displays
SUITA, Japan, April 22, 2019 — When researchers at Osaka University measured the optical birefringence of highly aligned cellulose nanofibers, they found that cellulose’s intrinsic birefringence could be powerful enough to be used in optical displays. For its experiments,...
CPI, LightOx Collaborate on Light Therapy for Skin and Oral Cancers
SEDGEFIELD, England, April 18, 2019 — The Center for Process Innovation (CPI) and LightOx are collaborating on a photonics project to advance the development of next-generation cancer treatments using phototherapeutic methods.
New Phonon Laser Could Be Applied to Investigation of Quantum Physics
ROCHESTER, N.Y., April 17, 2019 — A phonon laser based on the optical tweezing technique invented by Nobel Prize recipient Arthur Ashkin was developed by researchers from Rochester Institute of Technology (RIT) and the University of Rochester. The researchers demonstrated a...
Biophotonic Therapy Decontaminates Organs Before Transplantation
SÃO PAULO, April 16, 2019 — A new technique for the decontamination of organs before transplantation using UV and red light irradiation has been developed by researchers at the São Paulo Research Foundation (FAPESP) in partnership with the University of Toronto. The...
Molecular Vibrations Imaged for First Time
IRVINE, Calif., April 15, 2019 — Scientists at the University of California, Irvine (UCI) focused light down to the size of an atom to produce the first images of a molecule’s normal modes of vibration. The images could provide a better understanding of the concept of...
Robotic Machine Vision Solution Can Process Shiny Objects
SAN ANTONIO, April 12, 2019 — A solution that enables industrial robots to scan and manipulate metallic objects that have been too “shiny” for machine vision to process has been developed by Southwest Research Institute (SwRI) and ROS-Industrial, the industry...
Spin Lasers Could Transfer Data Faster, Use Less Energy than Conventional Lasers
BOCHUM, Germany, April 11, 2019 — Currently, rapid data transfer via optical fiber is accomplished by transmitting light signals that code data by modulating the light intensity. Due to physical limitations, data transfer that is based on a modulation of light intensity, without...
Compact Laser Detects Greenhouse Gases Using Mid-IR Source
LAUSANNE, Switzerland, April 10, 2019 — A system developed at École Polytechnique Fédérale de Lausanne (EPFL), composed of a standard laser and a photonic chip, uses a mid-infrared light source to detect greenhouse and other gases. The team took a commercially available fiber laser and...
Metamaterials Embedded with Geometrical Optics Could Simplify Optical Devices
MEDFORD, Mass., April 9, 2019 — 3D-printed metamaterials developed by a Tufts University engineering team display properties not found in conventional materials. The fabrication methods used by the team demonstrate how stereolithography-based 3D printers can be used to create 3D...
Doctors Could Soon Use Light Therapy to Eradicate MRSA
WEST LAFAYETTE, Ind., April 9, 2019 — A treatment using blue light to eradicate MRSA could be in doctors’ hands in as little as two years.
New Approach to LEDs Could Reduce Costs of Public Lighting
KARLSRUHE, Germany, April 5, 2019 — To increase LED streetlight efficiency, a team at Karlsruhe Institute of Technology (KIT) developed an array of weaker LEDs to use as an alternative to conventional high-performance diodes. Streetlights with the new light heads will be tested in the...
Researchers Control Speed of Light in Free Space
ORLANDO, Fla., April 5, 2019 — Using a technique that someday help alleviate data congestion and prevent information loss, University of Central Florida (UCF) researchers have developed a way to speed up and slow down a light pulse. The new technique allows the speed of the pulse...
Researchers Pinpoint Origin of Photons in Gamma-Ray Bursts
WAKO, Japan, April 5, 2019 — Scientists from the RIKEN Cluster for Pioneering Research and their collaborators have shown that the photons emitted by long gamma-ray bursts (GRBs) originate in the photosphere, that is, in the visible portion of the relativistic jet that is...
Muscle-Like Material Contracts When Illuminated
ST. LOUIS, April 5, 2019 — Researchers at Washington University in St. Louis (WUSTL) developed the material that in experiments showed the ability to lift a weight by simply shining a light on it. Tests are being conducted to determine the polymer’s best use, but the main...
Light-Activated Photodynamic Compounds May Eradicate Bladder Cancer
TORONTO, April 4, 2019 — A new clinical drug delivered through light-activated photodynamic compounds is showing promise in eradicating bladder cancer after just one treatment with a complete response to the drug recorded at 360 days.
All-Dielectric Nanoantennas Enable Study of Temperature-Mediated Effects
VLADIVOSTOK, Russia, April 3, 2019 — Scientists at Far Eastern Federal University (FEFU) have devised a method for efficiently mass-producing silicon-germanium (Si-Ge) fully alloyed nanoantennas. The electron-beam lithography traditionally used for production is expensive and...
Light Therapy Could Help Prevent Vision Problems in Premature Infants
CINCINNATI, April 2, 2019 — The discovery of a light-dependent molecular pathway that regulates how blood vessels develop in the eye could lead to the use of light therapy to help premature infants, whose eyes are still developing, avoid vision problems. Called the opsin...
Computational Methods Enable Solid-State Lighting to Self-adjust
BARCELONA, Spain, April 2, 2019 — Researchers from the Catalonia Institute for Energy Research (IREC) and Ledmotive Technologies have developed a two-step approach to generate arbitrary spectral power distributions (SPDs) using multichannel LED engines. This approach could be used...
Liquid Crystals Could Help Protect Against Laser Pointer Attacks
ROMEOVILLE, Ill., April 1, 2019 — Liquid crystals could someday be used to help deflect laser pointer attacks on aircraft, regardless of the wavelength used in the attack. According to the Federal Aviation Administration, 6,754 laser strikes on aircraft were reported in 2017. The...
Inverse-Designed Metastructures Operate with Light to Perform ‘Photonic Calculus’
PHILADELPHIA, March 27, 2019 — A research team at the University of Pennsylvania has demonstrated a metamaterial device that can function as an analog computer. Such processing typically requires complex systems of bulk optical elements like lenses, filters, and mirrors. The...
In a New Quantum Simulator, Light Behaves Like a Magnet
LAUSANNE, Switzerland, March 26, 2019 — When following the laws of quantum mechanics, systems made of many interacting particles can display behavior so complex that they cannot be quantitatively described by even the most powerful computers. In 1981, visionary physicist Richard Feynman...
Textile-Based Display Module Is Self-Powered, Washable
DAEJEON, South Korea, March 25, 2019 — A Korea Advanced Institute of Science and Technology (KAIST) research team has developed a textile-based wearable display module technology that is washable and does not require an external power source. The team fabricated its wearable display...
Quantum Dots Demonstrate High Luminescence Efficiency
STANFORD, Calif., March 22, 2019 — A new technique for precisely measuring quantum dot (QD) performance, developed by researchers at Stanford University, showed that groups of QDs reliably emit about 99.6 percent of the light they absorb, with a potential error of 0.2 percent in...
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