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Liquid-Based White LEDs Achieve High Luminous Efficiency
ISTANBUL, July 16, 2018 — Quantum dot (QD) white LEDs that show a luminous efficiency of 105 lm/W have been developed. The QDs are liquid-based and, according to researchers, could help the LEDs achieve an efficiency double that of LEDs that incorporate quantum dots in solid films. With further development, researchers say the new LEDs could reach efficiencies over 200 lm/W. Researchers created nanomaterial-based white LEDs that exhibit a record high efficiency thanks to quantum dots that are suspended
Researchers Develop Tough Photopolymers for 3D Printing
VIENNA, July 16, 2018 — A new approach to producing tailored methacrylate-based photopolymers has been developed. This approach, which does not slow down the light curing process, could lead to tough photopolymers for 3D printing and biomedicine. The new approach by a team...
Kirigami-Inspired Technique Manipulates Light at Nanoscale
CAMBRIDGE, Mass., and BEIJING, July 13, 2018 — Researchers have applied the principles of kirigami — the traditional art of paper folding and cutting — to the fabrication of advanced 3D nanodevices for manipulating light. The team believes that “nanokirigami” could offer...
LED Lights Reduce Bird Deaths from Fishing by 85 Percent
EXETER, England, July 12, 2018 — Researchers report that illuminating fishing nets with LED lights could reduce the number of seabirds that die from getting caught in nets by more than 85 percent. Fishing net with LED lights. Courtesy of ProDelphinus. Researchers from the...
Plasmonic Patch Boosts Fluorescence for Biosensing, Bioimaging
ST. LOUIS, Mo., July 12, 2018 — To strengthen weak signals in fluorescence-based detection and imaging techniques, researchers have developed an inexpensive plasmonic patch that can increase fluorescence intensity up to 100×. The patch, about a centimeter square, is based on...
Hollow Glass Whispering Gallery Resonator Improves Nanoparticle Detection
OKINAWA, Japan, July 11, 2018 — A newly fabricated whispering gallery resonator (WGR), in the form of a tiny glass bubble just a hair’s breadth wide, has demonstrated the ability to detect the presence of minute particles more effectively than existing WGRs. The hollow glass...
Laser Experiments Reveal New Insights into Metal Core at Center of Earth
EDINBURGH, Scotland, July 11, 2018 — Using high energy laser beams and optical sensors, a scientific team from the University of Edinburgh conducted experiments to replicate conditions at the Earth’s core. Scientists observed the behavior of nitrogen samples at more than one...
Luminescent Lighting Supports Arctic Greenhouse
TOMSK, Russia, July 10, 2018 — In an autonomous greenhouse being piloted for Arctic conditions, scientists are testing the use of polycrystalline luminescent materials for lighting. Since these materials efficiently convert UV radiation into visible, high-thermal characteristics,...
National Ignition Facility Sets New Laser Energy Record
LIVERMORE, Calif., July 10, 2018 — Lawrence Livermore National Laboratory’s (LLNL) National Ignition Facility (NIF) laser system has set a new record, firing 2.15 MJ of energy to its target chamber. This is a 15 percent improvement over NIF’s design specification of 1.8...
OLED Surpasses 100 Percent Exciton Production Efficiency
FUKUOKA, Japan, July 10, 2018 — In a new approach to improving OLED efficiency, researchers are using singlet fission to split the energy of one exciton in two. This approach has made it possible for the team to exceed the 100 percent limit for exciton production efficiency in...
Ultralow-Noise Amplifiers Show Exceptional Reach for High-Speed Optical Communications
GOTHENBURG, Sweden, July 9, 2018 — The reach and capacity in today’s fiber optical transmission links are limited by the accumulation of noise (originating from optical amplifiers in the link) and by the signal distortion from nonlinear effects in the transmission fiber. In...
Semiconductor Transistor Is Triggered by Light
COLLEGE PARK, Md., July 6, 2018 — Researchers have demonstrated a single-photon switch and transistor that is enabled by solid-state quantum memory. The device consists of a semiconductor spin qubit coupled to a nanophotonic cavity. It is extremely compact (roughly 1 million of the...
Cloaking Approach Manipulates Light as It Passes Through a Target
MONTREAL, July 5, 2018 — In novel approach to invisibility cloaking, the frequency of light waves is manipulated as the light passes through a target object. Called a spectral invisibility cloak, the new device can completely hide objects under broadband illumination,...
Capasso Group Develops Flat Lenses with Same Technology Used to Make Chips
CAMBRIDGE, Mass., July 5, 2018 — Optics and lenses are everywhere. They’re in laptops, cameras, and telescopes. Focusing the entire visible spectrum with lenses has been a challenge because each wavelength moves through materials at different speeds. Red wavelengths will move...
Graphene Photodetector Demonstrates Speed, High Responsivity
LOS ANGELES, July 5, 2018 — A new photodetector, made with graphene, can operate across a broader range of wavelengths and process images faster than existing photodetectors. The detector is also more sensitive to low levels of light than current technology. Researchers from...
THz Imagers Achieve Flexibility Using Tunable Carbon Nanotubes
TOKYO, July 3, 2018 — Researchers have developed flexible, bendable terahertz (THz) imagers based on chemically adjustable semiconducting carbon nanotube (CNT) films. The CNT films can be tuned to maximize THz detector performance. Flexible THz imagers could expand the...
All-Optical Ultrasound System Provides Video-Rate, 2D Imaging
LONDON, July 3, 2018 — Researchers demonstrated the use of an all-optical ultrasound imager for video-rate, real-time 2D imaging of biological tissue. The achievement is an advance toward making all-optical ultrasound practical for routine clinical use. In contrast to...
Light Mixer Generates 11 Colors Simultaneously
ALBUQUERQUE, N.M., July 2, 2018 — An optical frequency mixer has been developed that uses a novel nanostructured metamaterial to concurrently generate 11 different colors of light. The metamaterial is made from an array of gallium arsenide (GaAs) nanocylinders. Each nanocylinder is...
Luminate NY Names Double Helix Top Winner of Competition's First Round
ROCHESTER, N.Y., July 2, 2018 — Double Helix Optics was named the overall winner in the first round of the Luminate NY competition. The Boulder, Colo.-based company will receive $1 million in follow-on funding from New York state through the Finger Lakes Forward Upstate...
New Technique Boosts Photovoltage for Perovskite Solar Cells
GUILDFORD, England, July 2, 2018 — A technique for producing high-performance inverted perovskite solar cells, called solution-process secondary growth (SSG), was shown to increase the voltage of inverted perovskite solar cells by as much as 1.21 V. Inverted planar perovskite solar...
Smartphone App Moves Fashion Forward
Jun 29, 2018 — Imagine being able to change the pattern of a shirt or pants via a smartphone app. A solid purple shirt, for example, now has the ability to gradually change colors or even become striped, all with the touch of a button on a smartphone or computer....
Nighttime Light Pollution May Be Cause of Insect Population Decline
BERLIN, June 29, 2018 — An analysis of the effects of artificial light at night on insects shows that there is strong evidence to suggest a link between nighttime light pollution and declines in insect populations. Scientists from the Light Pollution and Ecophysiology...
Large Laser Crystal Could Serve as Active Medium for Lidar
KAZAN, Russia, June 29, 2018 — A colquirite crystal grown over a three-year period by a team of Kazan University physicists could be used with lidar to detect polluting compounds in the Siberian atmosphere and measure their concentration more precisely. Tests showed that the...
LaCroix Precision Optics Names New President
BATESVILLE, Ark., June 28, 2018 — Precision optics manufacturer LaCroix Precision Optics has announced the promotion of Kirk Warden to president of the company, effective July 2. Warden will replace Raymond LaCroix Jr., who will assume the role of chairman of the board. Warden has...
Portable Camera Module Could Monitor Health From Home
NARA, Japan, June 28, 2018 — Fundus photography, a standard imaging tool used by ophthalmologists, has existed for almost two centuries. However, its use in remote and low-resource regions, where traveling to a clinic is not always practical, has been limited. A compact eye...

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