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Research & Technology News
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 presents a potential solution to a long-standing roadblock to increasing fiber transmission rates: Beyond a threshold power level, additional power irreparably distorts the information. "Today's fiber optic systems are a little like
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...
Ultrafast Lasers Create 3-D Crystal Waveguides in Glass
BETHLEHEM, Pa., June 9, 2015 — Femtosecond laser pulses can create complex single-crystal waveguides inside glass – a discovery that could enable photonic integrated circuits (PICs) that are smaller, cheaper, more energy-efficient and more reliable than current networks...
System Combines Optical Microscopy, MRI
MUNICH, June 8, 2015 — Combining optical and MRI techniques, a new imaging system aims to uncover the complexities of tumors to help better tailor cancer treatment. The preclinical and intravital molecular imaging system houses a window for tissue observation in addition...
Holographic Microscopy, Machine Learning Software to ID Bacteria
DAEJEON, South Korea, June 8, 2015 — Pairing holographic microscopy with machine learning software could help hospitals and the food industry screen for bacterial infection in real time. A quantitative phase imaging unit (QPIU) developed at the Korea Advanced Institute of Science and...
Black Silicon Solar Cell Efficiency Jumps to 22.1%
ESPOO, Finland, June 5, 2015 — With a newly certified 22.1 percent efficiency rating and wider angular acceptance than other materials, "black silicon" solar cells may now be ready for prime time. Researchers from Aalto University in Finland and the Polytechnic University of...
Quantum Dots Used to Create 'Electronic Tattoos'
DAEJEON, South Korea, June 5, 2015 — Flexible, stretchable LEDs based on quantum dots can be manufactured in ultrathin sheets and applied to human skin like a sticker. These low-voltage "electronic tattoos" could be the next step in wearable technologies, according to researchers from...
Optogenetics Offers Treatment for Laryngeal Paralysis
BONN, Germany, June 4, 2015 — Optogenetics techniques could be exploited to treat laryngeal paralysis, a condition that interferes with speaking, swallowing and breathing. Researchers at the University of Bonn have made individual larynx muscles in mice responsive to light by...
Tunable Laser Diode Taps NIR for Data Transmission
SENDAI, Japan, June 3, 2015 — Tapping into undeveloped frequency bands, a new ultracompact heterogeneous-wavelength laser diode could enable higher-capacity optical data transmission systems. The device combines silicon photonics and quantum-dot (QD) technology and demonstrates...
Fiber Microendoscope Could Reduce Unnecessary Biopsies
HOUSTON, June 3, 2015 — A low-cost, portable, battery-powered microendoscope developed at Rice University could reduce the need for costly biopsies for many patients undergoing screening for esophageal cancer. That's the conclusion of researcher behind a clinical study...
Coating Brings MEMS Flexibility to Laser Welding
ITZEHOE, Germany, June 2, 2015 — A new protective coating for silicon mirrors based on microelectromechanical systems (MEMS) allow precision cutting and welding with high-power lasers. Up to now, it has been possible to use these small mirrors only with laser outputs of a few...
Reflective Roof Cooler than Ambient Air Temperature
SYDNEY, June 2, 2015 — A potential new roofing material stays cooler than the ambient air temperature, even under the midsummer Australian sun. Comprising a coated polymer stack on a silver thin film, the surface exhibited nearly 100 percent solar reflectance and thermal...
Lasers Inject 'Cargo' into Cells at High Speed
LOS ANGELES, May 29, 2015 — A laser device that injects relatively "large-sized cargo" into mammalian cells at high speed could aid the study of disease. Called a biophotonic laser-assisted surgery tool, or BLAST, the device was developed by engineers and doctors at the...
Laser Stimulation Reveals New Details in Fossils
LAWRENCE, Kan., May 28, 2015 — Handheld lasers can cause fossils to fluoresce, revealing complex details unseen with traditional visual enhancers like UV light. The approach could help paleontologists identify microfossils in soil more quickly, and even detect fake or composite...
Metamaterial Hyperlens Breaks Diffraction Limit
BUFFALO, N.Y., May 26, 2015 — A new metamaterial design has enabled a hyperlens capable of imaging details smaller than the wavelengths of visible light. Developed at the University at Buffalo, the new device relies on a nonresonant, waveguide-coupled design to overcome losses...
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