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Ultrafast Fiber Laser Boasts Simple Design
WARSAW, Poland, Aug. 24, 2015 — Heat and vibration are no problem for an ultrafast laser with a cavity made entirely of polarization-maintaining optical fibers The design emits 220-fs pulses with energies up to 3.5 nJ. Its 1030-nm output wavelength can be multiplied by generating higher-order harmonics. The device could be useful for materials processing, as well as sensing and imaging, according to its developers at the University of Warsaw. "In our laser, the ultrashort pulses are generated directly in
Common Materials Could Simplify White LED Manufacturing
PISCATAWAY, N.J., Aug. 19, 2015 — Computational models identify combinations of materials that could help reduce the costs of manufacturing white LEDs. Experiments by Rutgers University researchers suggest materials and processes for phosphor-converted white LEDs (PC-WLEDs) that...
Laser Technique Cools Broader Range of Elements
SOUTHAMPTON, England, Aug. 18, 2015 — A versatile laser cooling technique proposed 15 years ago now has partial experimental verification. In principle the technique could be used to cool a broader range of elements than is possible with current methods. Researchers at the University of...
Implantable Optogenetics Device Powered Wirelessly
STANFORD, Calif., Aug. 17, 2015 — Combining optogenetics and wireless energy transfer technology, a new device is said to be the first fully implantable platform for optical neural stimulation. The device dramatically expands the scope of optogenetics research to include experiments...
Method Lends 'True Color' to Superresolution Microscopy
BERKELEY, Calif., Aug. 17, 2015 — Building on earlier superresolutions methods, a new microscopy technique provides nanoscale spatial information on individual molecules while also revealing their spectra. SR-STORM, or spectrally resolved stochastic optical reconstruction...
Solid Tunable Lens Aims for Gentler Colonoscopies
SINGAPORE, Aug. 14, 2015 — An endoscopic probe with adjustable-focus capabilities in a slim package could facilitate more effective and less painful colonoscopies. Researchers at the National University of Singapore (NUS) developed the instrument using prototypical solid...
Chip Simplifies Quantum Optics Experiments
BRISTOL, England, Aug. 14, 2015 — JFL Chip Simplifies Quantum Optics Experiments BRISTOL, England, Aug. 14, 2015 — A chip that can process photons in an infinite number of ways could speed up development of quantum computing. Researchers say the device is a step quantum...
David Williams Wins $500K to Advance Adaptive Optics, Human Vision Research
NEWPORT BEACH, Calif., Aug. 14, 2015 — A pioneer in the use of adaptive optics to improve human sight, University of Rochester professor David Williams has received the 2015 Beckman-Argyros Award in Vision Research. The award is given annually by the Arnold and Mebel Beckman Foundation...
Microresonators Generate Combs for Communications, Spectroscopy
WEST LAFAYETTE, Ind., Aug. 12, 2015 — Single microresonators able to generate light pulses at several discrete frequencies could eliminate the need to integrate multiple lasers into communications and spectroscopy equipment. Researchers at Purdue University have developed a way use...
Theoretical Materials 'Invisible' to Light Waves
VIENNA, Aug. 11, 2015 — Materials that allow light to pass through without distortion are possible, according to a new set of calculations by an international team of researchers. When a light wave travels through free space, its intensity can be the same everywhere. But...
Photonic Crystal Boosts QD Light Output
CHAMPAIGN, Ill., Aug. 10, 2015 — Combining quantum dot (QD) and photonic crystal technology could lead to brighter and more efficient displays and lighting. Researchers from the University of Illinois have developed a new method that extracts polarized light from QDs over a large...
LED-Based Heating, Cooling Method Leads to Faster DNA Diagnostics
BERKELEY, Calif., Aug. 6, 2015 — Developed by bioengineers at the University of California, Berkeley (UC Berkeley), an advanced thermal cycling system is expected to expand clinical and research applications associated polymerase chain reaction (PCR) tests. The technology has shown...
Chip-Scale Laser Produces White Light
TEMPE, Ariz., July 31, 2015 — Able to produce white light, a chip-scale semiconductor laser brings the technology one step closer to becoming a mainstream light source and potential alternative to LEDs. Brighter and more energy efficient than LEDs, the new laser design could be...
New 'Smart Window' Materials Allow Faster Switching
AUSTIN, Texas, July 28, 2015 — Nanocrystal-based windows that selectively block different wavelengths of sunlight could help keep homes cool but still well lit — or warm but dark. The technology has taken a major step toward commercialization because it blocks up to 90...
Lasers Transform Drug into More Useful Form
SUITA, Japan, July 28, 2015 — Exposure to laser light may make one type of anti-inflammatory drug more effective. Researchers at Osaka University used lasers to induce selective crystallization of the metastable form of indomethacin. The exposed drug remains in that form for up...
Plasmonic Device Achieves 90-GHz Switching
DURHAM, N.C., July 27, 2015 — Able to flip on and off 90 billion times a second, a new plasmonic light emitter could form the basis of optical computing. "This is something that the scientific community has wanted to do for a long time," said Duke University professor Maiken...
Microlasers Track Cells from the Inside
ST. ANDREWS, Scotland, July 24, 2015 — Embedded microlasers could allow scientists to track and distinguish between several hundred thousand cells simultaneously. The approach could enable new forms of cell tracking, intracellular sensing and adaptive imaging, according to researchers at...
Fluorescent Mesh Aids Tissue Regrowth
LINKÖPING, Sweden, July 22, 2015 — Polymer fibers provide a mesh for tissue growth that can be monitored through near-infrared fluorescence imaging. Originally developed for solar cells, the material, called TQ1, exhibits fluorescent lifetimes in the subnanosecond range, which is...
Selective Laser Micromelting Creates Medical Implants
HANNOVER, Germany, July 22, 2015 — Selective laser micromelting allows processing of new materials that could be useful in medical implants. Researchers at Laser Zentrum Hannover EV and the University of Rostock used the additive process to coat electrodes for pacemakers with a...
Microlens Array Spawns Massive Microscope Image
CAMBRIDGE, Mass., July 21, 2015 — A new multispectral device is said to have produced the largest microscope image ever, combining 13 color channels gathered by thousands of microlenses into a nearly 17-gigapixel picture. Able to rapidly process very large amounts of biomedical...
Optical Glucose Sensor on Commercial Path
LEEDS, England, July 17, 2015 — A University of Leeds spin-out company is seeking to commercialize an optical glucose sensor that could make finger-prick blood tests unnecessary for people with diabetes. Glucosense Diagnostics Ltd. intends to make tabletop and wearable versions of...
QDs, Perovskites Team Up in Superefficient IR LEDs
TORONTO, July 16, 2015 — Getting the crystalline structures of quantum dots and perovskites to align could yield high-efficiency LEDs. Emitting in the IR region, these hybrid materials could have applications in night-vision and gesture-recognition technology, biomedical...
Blue LEDs Could Help Preserve Certain Refrigerated Foods
SINGAPORE, July 15, 2015 — Blue light may be the key to keeping chemical preservatives out of certain food products. A team of scientists from the National University of Singapore has found that blue LEDs have strong antibacterial effect on major foodborne pathogens, and are...
Optogenetics Protein Mechanics Characterized
SANTA CRUZ, Calif., July 15, 2015 — Researchers at the University of California, Santa Cruz, have identified the molecular mechanism involved in the light-induced activation of Channelrhodopsins — a discovery that could help scientists create proteins optimized for optogenetics....
Laser-Writing of DVDs May Have a Speed Limit
PASADENA, Calif., July 14, 2015 — Phase-change materials used in DVDs and other digital storage media pass through a previously unknown intermediate atomic state under laser pulses. The discovery could lead to faster computer memory systems with larger storage capacity, but may also...

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