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Low-Energy Photons Upconverted Using Nontoxic Material RIVERSIDE, Calif., Dec. 6, 2019 — Researchers at the University of California, Riverside (UC Riverside) and the University of Texas at Austin demonstrated the use of nontoxic silicon nanocrystals to convert low-energy photons into high-energy ones. The use of nontoxic materials for photon upconversion could help advance the development of photodynamic treatments for cancer. Ultraviolet (UV) light can form free radicals that can attack cancer tissue. However, it does not travel deep enough into tissues to generate
New Approach Could Improve Colloidal Quantum Dot Lasing for Use in Displays SINGAPORE, Dec. 5, 2019 — Researchers at Nanyang Technological University (NTU Singapore) have demonstrated tunable, controllable amplified spontaneous emission (ASE) in a colloidal semiconductor device via electric field-induced charging. Their work could open new avenues...
Scientists Develop Photocatalyst That Can Turn CO2 to Fuel CHICAGO, Dec. 5, 2019 — In a recent study from the U.S. Department of Energy’s (DOE) Argonne National Laboratory, scientists used a photocatalyst largely made of copper to transform carbon dioxide (CO2) to methanol. The researchers used a photocatalyst made of...
Clear, Conductive Coating Could Protect Solar Cells, Display Screens CAMBRIDGE, Mass., Dec. 2, 2019 — MIT researchers have improved on their initial version of a transparent, conductive coating material for solar cells and touch screens, producing a tenfold gain in its electrical conductivity. The high-performing, flexible material, an organic...
Plasmonics-Based Light Detector Could Support Precision Agriculture DURHAM, N.C., Nov. 27, 2019 — A new, broad-spectrum photodetector that can be implemented on a single chip has been developed at Duke University. The photodetector spans a range of light frequencies by using on-chip spectral filters created with electromagnetic materials. The...
Electrode-Water Interface Produces Giant Pockels Effect for a ‘Liquid’ Light Modulator TOKYO, Nov. 25, 2019 — A new type of light modulator could lead to a better understanding of how the Pockels effect occurs in different types of materials, making it possible to more fully explore its potential in optical applications. A team of scientists at the Tokyo...
Scientists Make Vampire Bats Glow to Simulate Vaccine Spread ANN ARBOR, Mich., Nov. 26, 2019 — University of Michigan scientists and their colleagues used glowing fluorescent gel to test the potential effectiveness of vaccines to control rabies and other diseases in wild bats. The study, originally published in the journal Nature Ecology...
Photonic Accelerator Could Increase Computation Speed and Efficiency HAMAMATSU, Japan, Nov. 19, 2019 — A new photonic integrated circuit device, developed by researchers in Japan, can be placed at the front end of a digital computer and optimized to perform specific functions with less power consumption than is needed for fully electronic devices....
2D Material for Photodetectors Is Less Costly, More Sensitive Than Gold PHILADELPHIA, Nov. 15, 2019 — Researchers at Drexel University are using MXene, a 2D transition metal carbide (Ti3C2), to fabricate photodetectors with improved sensitivity for substantially less cost. The researchers replaced gold, typically used in the fabrication of...
Biosensor Uses Raman Scattering to Help Ensure Safety of Stem Cell Therapies NEW BRUNSWICK, N.J., Nov. 12, 2019 — A research team at Rutgers University has developed a biosensor technology that could benefit applications for the treatment of neurological disorders through stem cell therapy. The hybrid biosensing platform consists of an array of ultrathin...
Metasurfaces Enable Low-Loss Integrated Photonics Platform NEWARK, Del., Nov. 12, 2019 — A University of Delaware (UD) research team has designed an integrated photonics platform using metasurfaces. To limit the loss of data, the team fabricated a high-contrast transmitarray (HCTA)-based metalens on a silicon-based chip programmed with...
Photonic Crystals Show Fast Response Speeds for Next-Gen Displays STATE COLLEGE, Pa., Nov. 11, 2019 — A technique to restructure liquid crystals could lead to the development of fast-responding liquid crystals suitable for next-generation displays and advanced photonic applications such as mirrorless lasers, biosensors, and fast/slow light...
Empire State Development Announces Round III Finalists of the Luminate NY Accelerator ROCHESTER, N.Y., Nov. 8, 2019 — Empire State Development has announced its list of 10 finalists for the Lightning Round of Luminate NY, the world’s largest business accelerator for optics, photonics, and imaging (OPI) startups. The event, hosted the evening of Nov. 7 by the...
Light Irradiation Increases Charging Rates of Lithium-Ion Batteries LEMONT, Ill., Nov. 1, 2019 — Researchers at the U.S. Department of Energy’s (DOE) Argonne National Laboratory have discovered a new mechanism to speed up the charging of lithium-ion batteries for electric vehicles. By exposing the cathode to a beam of concentrated light...
A Stretchable Display Safely Lights Up Human Skin NANJING, China, Oct. 31, 2019 — A stretchable light-emitting device that operates at low voltages and is safe for human skin, developed by researchers at Nanjing University, could one day provide runners and others with a convenient alternative to a stopwatch or cellphone,...
Polymer Lenses Could Lower IR Detection Costs for Consumer Products TUCSON, Ariz., Oct. 30, 2019 — A team led by University of Arizona materials scientist Jeffrey Pyun is using a sulfur-based polymer made from waste generated by fossil fuels to develop consumer-grade infrared (IR) plastic lenses. The team has refined this material, which it first...
Infrared Detector Improves Night-Vision Capabilities at Room Temperature ORLANDO, Fla., Oct. 25, 2019 — Researchers at the University of Central Florida (UCF) have devised a strategy for uncooled, tunable, multispectral infrared (IR) detection. The team showed that room-temperature photodetection using 2D monolayer graphene is possible through the...
Compact IR Spectrometer Fits on a Chip ZURICH, Oct. 24, 2019 — In an advance for smartphone spectroscopy, researchers at ETH Zurich have developed a chip about 2 cm2 in size that can be used with a smartphone to analyze infrared (IR) light in the same way a conventional spectrometer would. The researchers...
Researchers Determine Quantum Light Source in 2D Material VIENNA, Oct. 23, 2019 — Scientists at the Vienna University of Technology (TU Wien) have uncovered the source of a special type of quantum light created at certain points in the 2D material tungsten diselenide (WSe2) when it is supplied with energy. They found that this...
3D Printer Dissipates Heat With UV Light, Stereolithography EVANSTON, Ill., Oct. 22, 2019 — Northwestern University researchers have developed a stereolithographic 3D printer that can print an object the size of an adult human in just a couple of hours. Called HARP for high-area rapid printing, this printer uses a patent-pending version of...
New BPV System Flaunts More Power, Longer Life BEIJING, Oct. 14, 2019 — A new biophotovoltaics (BPV) system developed by researchers at the Chinese Academy of Sciences’ Institute of Microbiology has proven more powerful than any similar system. It also touts the greatest longevity. The new system is based on a...
Graphene-Based Measurement Technique Boosts Optical Resolution GÖTTINGEN, Germany, Oct. 11, 2019 — Researchers at the University of Göttingen have developed a new technique that exploits the unusual properties of graphene to optically measure extremely small distances — to the order of one ångström — for the first...
Inverse, Mie Scattering Techniques Advance 3D Metamaterial Design SEATTLE, Oct. 10, 2019 — Using an inverse design approach, a team led by researchers at the University of Washington designed and tested a 3D-printed metamaterial that can manipulate light with nanoscale precision. Though the researchers chose a spiral helix pattern for...
Integrated Silicon Carbide Optical Switch Can Be Thermally Tuned ATLANTA, Oct. 4, 2019 — Researchers at Georgia Institute of Technology (Georgia Tech) have integrated a microheater and a microring resonator onto a silicon carbide (SiC) chip, creating a photonic integrated chip that can be thermally tuned by applying an electric signal....
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...
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