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Boron Turns Graphene into Blue Light Emitter
FRANKFURT, Germany, July 14, 2015 — Chemists at Goethe University Frankfurt have developed a new class of organic luminescent materials through the targeted introduction of boron atoms into graphene. The compounds exhibit an intense blue fluorescence and, consequently, are of interest for use as organic LEDs, or OLEDs. Within graphene, benzene rings are fused to form a honeycomb structure. Sections of this structure, referred to as nanographenes or polycyclic aromatic hydrocarbons (PAHs), play an integral role in organic
MoS2 Films Made at Room Temperature in New Process
SOUTHAMPTON, England, July 13, 2015 — A new chemical vapor deposition process allows fabrication of wafer-scale films of molybdenum disulfide (MoS2), which until now has been commercially available only in microscale flakes. The advance could pave the way for the large-scale manufacture...
Graphene Confines Light for Nanomolecular Sensing
LAUSANNE, Switzerland, July 10, 2015 — A plasmonic sensor made of graphene can conduct complex analyses of the smallest molecules without altering them. The device overcomes a limitation of traditional IR absorption spectroscopy, according to researchers at the Swiss Federal Institute of...
Light-Activated Drugs Help Target Tumors, Cut Side Effects
MUNICH, July 9, 2015 — A new technique that uses light to activate chemotherapy drugs in specific cells shows promise as a way to improve the effectiveness of cancer therapies while preventing severe side effects. By making existing cancer drugs sensitive to light, this...
Spectrometer Aims at Disease Detection in Breath
ADELAIDE, Australia, July 9, 2015 — An IR frequency comb spectrometer could help clinicians detect diabetes, infections and cancers by analyzing the air patients exhale. The system uses a commercial frequency comb, variable-length Fabry Perot filter cavity, virtually imaged phased...
Spectrometers Delivered for Mission to Asteroid
LITTLETON, Colo., July 9, 2015 — The Lockheed Martin Space Systems facility has received the first of five optical instruments to be installed in NASA's Origin Spectral Interpretation Resource Identification Security-Regolith Explorer (OSIRIS-REx) spacecraft. Led by the University...
Plasmon Wakes Created, Controlled in Metamaterial
CAMBRIDGE, Mass., July 7, 2015 — Surface plasmons can exhibit wakes likes any other wave, and those wakes can be controlled through nanoscale features on a metallic surface and properties of the light shining on it. The creation and control of surface plasmon wakes could lead to...
Microscopy Platform Enables Ultrastable Measurements
BOULDER, Colo., July 2, 2015 — Stable enough to track the movements of individual molecules over many hours, a new measurement platform for microscopes could enable a deeper understanding of subcellular processes. The technology was designed to track single base pairs in human...
Strain Measurement Optimizes Nanowire LEDs
COPENHAGEN, Denmark, June 30, 2015 — Tiny defects can affect the performance of nanowire LEDs. Now researchers have a way to detect these defects and potentially correct them. A team from the Niels Bohr Institute at the University of Copenhagen used x-ray microscopy to pinpoint exactly...
Lasers Improve Blade Maintenance for Stone Cutting
HANNOVER, Germany, June 30, 2015 — Lasers and glue could replace the solder used today to attach diamond cutting segments to rotary blades used in stone cutting. Laser Zentrum Hannover EV (LZH) and the Institute for Tool Research and Materials (IFW) in Remscheid have developed a...
€6.2M Project Aims for 25% Efficiency from Thin-Film Solar Cells
STUTTGART, Germany, June 29, 2015 — A consortium of 11 European universities, research facilities and businesses has set out to create thin-film solar cells to rival the efficiency and cost of multicrystalline technology. The three-and-a-half-year project is supported by €4.6...
Flexible Film Creates Colors from Reflected Light
ORLANDO, Fla., June 26, 2015 — From couture to camouflage, a new ultrathin color-changing film could one day change what we wear. Unlike other flexible display technology, the film, which was developed at the University of Central Florida, reflects rather than emits light. It was...
Optical Cavity Allows for Measurement of Nanosystems
MUNICH, June 26, 2015 — A new type of microscope uses an optical cavity to dramatically enhance image signals and enable detailed measurements of the structure and movements of individual nanoparticles The technique has potential applications in biology, chemistry, and...
Frequency Combs Reverse Crosstalk, Extend Range of Fiber Transmission
SAN DIEGO, June 25, 2015 — Frequency combs could eliminate the need for the repeaters necessary for maintaining signals over long distances in today's fiber-optic networks. Developed at the University of California, San Diego, a patent-pending approach using frequency combs...
Spin Hall Effect Called Fundamental Property of Light
SAITAMA, Japan, June 25, 2015 — The spin of incident light determines the direction of propagation of evanescent waves along a surface, according to researchers at the Riken Center for Emergent Matter Science. The finding demonstrates that the quantum spin Hall effect, already...
Newly Discovered Corals Light Up Murky Depths
EILAT, Israel, June 25, 2015 — Deep-water corals recently discovered in the Red Sea display a surprising array of colors, the mechanisms of which could be developed into new bioimaging tools. An international team of researchers studied corals at depths of more than 50 m and...
Optic Cancels Starlight to Search for Exoplanets
MONTREAL, June 23, 2015 — A new type of adaptive optic blocks glare from distant suns to give astronomers a glimpse of the dimmer bodies that orbit them closely. The vector apodizing phase plate (vector-APP) coronagraph was installed at the 6.5-m Magellan Clay telescope in...
Laser Annealing Creates Nanoscale Lattices
UPTON, N.Y., June 23, 2015 — A new laser patterning technique can create large-scale nanostructured grids that could enhance manufacturing of optical coatings, solar cells and touch screens. Developed at Brookhaven National Laboratory, laser zone annealing (LZA) involves...
MEMS Display Harnesses Ambient Light to Create Color Images
SAN DIEGO, June 23, 2015 — A new type of display that uses tiny mirrors instead of light-emitting pixels could reduce screen glare and the amount of energy used by consumer electronics. Based on microelectromechanical systems (MEMS), the display consists of a thin absorbing...
Fog Chamber Aims for Better Optics Testing
ALBUQUERQUE, N.M., June 19, 2015 — A humid chamber in the desert of New Mexico is designed to help improve the abilities of cameras and sensors to penetrate fog. Sandia National Laboratories recently created the chamber — which is 180 feet long, 10 feet tall and 11 feet wide...
Study: OCT Could Aid Brain Tumor Removal
BALTIMORE, June 19, 2015 — Optical coherence tomography (OCT) holds promise for guiding surgeons as they operate on brain tumors and help them avoid removing healthy tissue. After identifying brain cancer's OCT signature, researchers at Johns Hopkins University have developed...
Metamaterial Waveguide Confirms Theoretical Prediction
ATLANTA, June 16, 2015 — A metamaterial waveguide has demonstrated opposite refractive indices at the fundamental and harmonic frequencies of light, confirming for the first time a decade-old theoretical prediction. The experimental verification of backward phase matching...
Graphene Filaments Provide Tunable On-Chip Light Source
NEW YORK, June 15, 2015 — Incandescent bulbs may be a thing of the past, but the principle of light-emitting filaments may have a new use in displays and optical communications. Researchers from the U.S. and South Korea collaborated to develop an on-chip visible light source...
Photonic Bandgap Fiber Reaches Telecom Scale
SOUTHAMPTON, UK, June 11, 2015 — New fabrication tools have enabled the creation of an 11-km photonic bandgap fiber that previously could only be manufactured in lengths of hundreds of meters. Its reach, as well as its low loss and a broad transmission bandwidth, make it a...
Terahertz System Achieves 32 Gb/s Wireless Data Transfer
VILLENEUVE-D'ASCQ, France, June 9, 2015 — A terahertz system has been used to transmit data at a rate of 32 Gb/s over 25 m, a demonstration that could have important implications for the future of wireless communications. Developed by the French Institute of Electronics, Microelectronics...

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