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Basic Science News
‘Embedded eigenvalue’ holds promise for sensors, lasers, more
CAMBRIDGE, Mass. – There are several ways to confine light, but a new approach uses two waves of the same length, but exactly opposite phases, to cancel each other out, allowing light of other wavelengths to pass freely. In mathematical terms, the new phenomenon – where one frequency of light is trapped while other nearby frequencies are not – is an example of an “embedded eigenvalue.” While this had been described as a theoretical possibility in 1929 by mathematician and computational ...
Control could make random lasers useful
VIENNA – Random lasers, with their very irregular angular emission pattern, are difficult to tune. But a team at Vienna University of Technology has theoretically shown that random lasers can be controlled by actively shaping the spatial pump distribution,...
GDD Measurements Boost Ultrafast Laser Performance
Oct 1, 2013 — Easy group delay dispersion measurements improve results in applications such as laser amplifiers, optical coatings, harmonic generation, bioimaging and microscopy. “Dude, where’s my pulse width?!” Anybody working with an ultrafast...
Laser safety: A university perspective
Oct 1, 2013 — Nearly every genre of scientific research has a niche where the laser is used. And, much as radioactive materials have transitioned from physics to biology, laser research techniques are invading arenas of science not traditionally seen as...
Mitsubishi Electric delivers focus unit to telescope
Oct 1, 2013 — The prime focus unit, a major component of the Hyper Suprime-Cam (HSC) prime focus camera newly installed in the Subaru Telescope on the Big Island of Hawaii, was delivered by Mitsubishi Electric Corp. to the National Astronomical Observatory of...
Nanowafer tunable for optimal light absorption
STANFORD, Calif. – A nanoengineered wafer that can be optimally tuned for light absorption is the thinnest, most efficient absorber of visible light to date, report engineers at Stanford University. “Achieving complete absorption of visible light with a minimal...
Photodetector discerns polarized light intrinsically
HOUSTON, and LIVERMORE, Calif. – Few photodetector materials can discern polarized light directly without a grate or a filter, but a newly created carbon-based broadband photodetector demonstrates intrinsic polarimetry. A team from Rice University and Sandia National Laboratories...
Plasmonics boosts performance in polymer LEDs, solar cells
Oct 1, 2013 — Using carbon-dot-supported silver nanoparticles to produce a surface plasmon resonance effect can boost the performance of both polymer LEDs (PLEDs) and polymer solar cells (PSCs) while keeping their structure simple. Most semiconducting...
Ti:Sapphire Laser Drives Accelerator on Chip
STANFORD, Calif., Oct. 1, 2013 — An advance that uses commercial lasers and low-cost, mass-production techniques could set the stage for a new generation of "tabletop" particle accelerators that are less expensive for use in science and medicine. Current state-of-the-art...
Well-rounded Molecules Make Better Light Emitters
SALT LAKE CITY, Sept. 30, 2013 — The more well-rounded the organic molecule the better when it comes to maximizing light emission, an international team of physicists and chemists have found. A team led by the University of Utah working to develop more efficient OLEDs believes it...
University of Calgary Launches Institute for Quantum Science and Technology
CALGARY, Alberta, Canada, Sept. 27, 2013 — The University of Calgary has announced the creation of the Institute for Quantum Science and Technology (IQST), a unit dedicated to research, training and outreach in the field of quantum science. The institute will focus on themes of quantum...
THz Sensor to Detect Viruses Before Outbreaks
DAYTON, Ohio, Sept. 26, 2013 — A new project aims to develop a sensor that uses gigahertz-to-terahertz (GHz-to-THz) radiation to detect viruses captured in nanofluidic chips, with the goal of using the system quickly in places where large, highly mobile groups congregate, such as...
Haptic Optical Tweezers Let Us ‘Feel’ Microstructures
PARIS, Sept. 16, 2013 — A new technology called haptic optical tweezers allows microscope users to manipulate samples by sight and touch, which could improve dexterity of micromanipulation and microassembly. The tweezers “will become an invaluable tool for force...
Bruker Acquires Prairie Technologies
BILLERICA, Mass., Sept. 13, 2013 — Scientific instruments provider Bruker Corp. has acquired Prairie Technologies Inc., a provider of fluorescence microscopy products. Specific terms were not disclosed. Madison, Wis.-based Prairie generated revenues of approximately $11 million in...
Tunable Polymer Could Make Truly White OLED
SALT LAKE CITY, Sept. 13, 2013 — Doping an organic polymer with platinum atoms makes the light it emits tunable, which could lead to the realization of cheaper, more efficient and truly white OLEDs. Existing white OLED displays use different organic polymers that emit different...
Bioimaging Laser Branches Out to Bomb Detection
EAST LANSING, Mich., Sept. 10, 2013 — A method originally developed for biomedical imaging puts the possibility of bomb-detecting lasers at security checkpoints within reach. Michigan State University chemistry professor Marcos Dantus has developed a laser that senses micro traces of...
Sculpted Light Captures Brain Activity
VIENNA, Sept. 9, 2013 — A high-speed imaging technique that “sculpts” the 3-D distribution of light in a sample can resolve a single neuron in a living worm, opening possibilities for studying the function of the organism’s nervous system and pairing...
Laser-Based Tool Tells Normal Tissue From Tumors
ANN ARBOR, Mich., & CAMBRIDGE, Mass., Sept. 5, 2013 — A new laser tool can microscopically distinguish between normal and cancerous brain tissue in real time. Since it doesn’t miss cells that could trigger new tumor growth, the method could make brain cancer surgery much more effective.
Active Pulse Management Enables Femtosecond Athermal Ablation
Sep 1, 2013 — In extremely short pulses, generally in the several-hundred-femtosecond regime, light interacts with matter fundamentally differently from the way other forms of energy do. This interaction allows micron-resolution features to be machined in...
Better Materials Mean Better Solar Cells
Sep 1, 2013 — Innovation in materials research is revealing a future in which solar power is inexpensive and efficient, and sunlight-harvesting thin films cover everything from airplanes to buildings. Crystalline silicon, or c-Si, is the dominant photon-absorbing...
LEDs Offer a Lighting Makeover
Sep 1, 2013 — New materials and manufacturing techniques are bringing LEDs closer to cost-effectiveness. The venerable lightbulb is going high-tech, thanks to LEDs: Light-emitting diode products are more efficient, longer-lived and more versatile than...
Raman Overcomes Challenges for Industry
Sep 1, 2013 — Raman spectroscopy is becoming increasingly prevalent in commercial applications. Challenges include making remote measurements of chemical species in high-pressure or high-temperature environments while customers demand compact instrumentation with...
Tabletop device accelerates electrons to 2 GeV
AUSTIN, Texas – Until recently, if you wanted to speed up electrons to 2 gigaelectron volts (GeV), you needed a multimillion-dollar accelerator nearly 200 m long. But not anymore: Now you just need a tabletop device. “We have accelerated about half a billion...
Spaghetti-like Surface Makes Stronger SERS Sensor
ZURICH & LIVERMORE, Calif., Aug. 30, 2013 — An innovative plasmonic sensor amplifies the signals of surface-enhanced Raman spectroscopy (SERS) using a novel substrate based on carbon nanotubes with metal-coated tips. Scientists at ETH Zurich and the Lawrence Livermore National Laboratory...
Existence of New Element Confirmed
DARMSTADT, Germany, Aug. 28, 2013 — Fresh evidence has been provided for the existence of a new, yet-to-be-named superheavy chemical element by measuring photons in connection with its decay. The experiment was conducted at the GSI research facility in Germany by an international team...
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May 2024
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