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Current Laser Pulses News and Events, Laser Pulses News Articles.
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Novel optics for ultrafast cameras create new possibilities for imaging
Researchers from the Camera Culture Group at the MIT Media Lab have reinvented photography optics to capture images based on the timing of reflecting light inside the optics, which opens doors to new capabilities for ultrafast time- or depth-sensitive cameras. (2018-08-13)

Terahertz technology creates new insight into how semiconductor lasers work
Pioneering engineers working with terahertz frequency technology have been researching how individual frequencies are selected when a laser is turned on, and how quickly the selection is made. (2018-08-13)

Renewables could drastically cut tailpipe emissions
Ethanol and related gasoline replacement fuels produce fewer smog-causing chemicals. (2018-08-12)

NIST shows laser ranging can 'see' 3D objects melting in fires
Researchers at the National Institute of Standards and Technology have used a laser detection and ranging (LADAR) system to image three-dimensional (3D) objects melting in flames. The method could offer a precise, safe and compact way to measure structures as they collapse in fires. (2018-08-08)

Scientists find holes in light by tying it in knots
A research collaboration including theoretical physicists from the University of Bristol and Birmingham has found a new way of evaluating how light flows through space -- by tying knots in it. (2018-08-01)

Fast, cheap and colorful 3D printing
People are exploring the use of 3D printing for wide-ranging applications, including manufacturing, medical devices, fashion and even food. But one of the most efficient forms of 3D printing suffers from a major drawback: It can only print objects that are gray or black in color. Now, researchers have tweaked the method so it can print in all of the colors of the rainbow. They report their results in the ACS journal Nano Letters. (2018-08-01)

Lasers write better anodes
Laser-scribed disordered graphene significantly improves sodium-ion battery capacity. (2018-07-30)

Extreme conditions in semiconductors
Physicists from the Universities of Konstanz, Paderborn and ETH Zurich have succeeded in experimentally demonstrating Wannier-Stark localization (2018-07-30)

Huge reservoir of liquid water detected under the surface of Mars
Providing resolution to a decades-long debate over whether liquid water is present on Mars, researchers using radar to probe the planet's polar ice caps have detected a lake of liquid water under the Martian ice. (2018-07-25)

Vibrations at an exceptional point
A team of international researchers led by engineers at Washington University has developed a way to use a light field to trigger a mechanical movement that will generate an acoustic wave. (2018-07-25)

Blasting tiny craters in glass, creating material to miniaturize telecommunication devices
Modern communication systems often employ optical fibers to carry signals across or between devices, combining more than one function into a single circuit. However, signal transmission requires long optical fibers, which makes miniaturizing the device difficult. Instead of long optical fibers, scientists have started testing planar waveguides. In the Journal of Applied Physics, investigators report on a laser-assisted study of a type of glass that shows promise as a material for broadband planar waveguide amplifiers. (2018-07-24)

The shape in water: First nanoscale measurements of biomolecule folding in liquid
For the first time, scientists have measured at the nanometer scale the characteristic folding patterns that give proteins their three-dimensional shape in water. (2018-07-23)

Researchers unravel more mysteries of metallic hydrogen
Liquid metallic hydrogen is not present naturally on Earth and has only been created in a handful of places, including the University of Rochester's Laboratory for Laser Energetics. LLE scientists are researching the properties of liquid metallic hydrogen to understand how planets both inside and outside our solar system form magnetic shields. (2018-07-23)

Generation of random numbers by measuring phase fluctuations from a laser diode with a silicon-on-in
Researchers have shown that a chip-based device measuring a millimeter square could be used to generate quantum-based random numbers at gigabit per second speeds. The tiny device requires little power and could enable stand-alone random number generators or be incorporated into laptops and smart phones to offer real-time encryption. (2018-07-23)

World's fastest man-made spinning object could help study quantum mechanics
Researchers have created the fastest man-made spinning object in the world, which they believe will help them study material science, quantum mechanics and the properties of vacuum. (2018-07-20)

Future electronic components to be printed like newspapers
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices. (2018-07-19)

Materials processing tricks enable engineers to create new laser material
By doping alumina crystals with neodymium ions, engineers at the University of California San Diego have developed a new laser material that is capable of emitting ultra-short, high-power pulses -- a combination that could potentially yield smaller, more powerful lasers with superior thermal shock resistance, broad tunability and high-duty cycles. (2018-07-18)

New cost-effective instrument measures molecular dynamics on a picosecond timescale
Studying the photochemistry has shown that ultraviolet radiation can set off harmful chemical reactions in the human body and, alternatively, can provide 'photo-protection' by dispersing extra energy. To better understand the dynamics of these photochemical processes, a group of scientists irradiated the RNA base uracil with ultraviolet light and documented its behavior on a picosecond timescale. They discuss their work this week in The Journal of Chemical Physics. (2018-07-17)

Exploding waves from colliding dissipative pulses
The interaction of traveling waves in dissipative systems, physical systems driven by energy dissipation, can yield unexpected and sometimes chaotic results. These waves, known as dissipative pulses are driving experimental studies in a variety of areas that involve matter and energy flows. In the journal Chaos, researchers discuss their work studying collisions between three types of DSs to determine what happens when these traveling waves interact. (2018-07-17)

Faster photons could enable total data security
Researchers at the University of Sheffield have solved a key puzzle in quantum physics that could help to make data transfer totally secure. (2018-07-16)

What happens when we heat the atomic lattice of a magnet all of a sudden?
'We now have a clear picture of how the hot atomic lattice and the cold magnetic spins of a ferrimagnetic insulator equilibrate with each other.' says Ilie Radu, scientist at the Max Born Institute Berlin. The international team of researchers discovered that energy transfer proceeds very quickly and leads to a novel state of matter in which the spins are hot but have not yet reduced their total magnetic moment. (2018-07-16)

Can ultrashort electron flashes help harvest nuclear energy?
EPFL physicists have now demonstrated experimentally the ability to coherently manipulate the wave function of a free electron down to the attosecond timescale (10-18 of a second). The team also developed a theory for creating zeptosecond (10-21 of a second) electron pulses, which could also be used to increase the energy yield of nuclear reactions. (2018-07-12)

A fish that subtracts its own electric signals to better 'see' through its murky habitat
The elephant-nose fish Gnathonemus petersii relies on electricity to find food and navigate through the obstacles riddling its native murky African rivers. On July 12 in the journal Neuron, Columbia University researchers present evidence that the fish's ability to accurately 'see' an 'electrical image' of its surroundings requires it to filter out its own electrical interference. (2018-07-11)

Simpler interferometer can fine tune even the quickest pulses of light
A super compact interferometer developed by the lab of Chunlei Guo, professor of optics at the University of Rochester, will give scientists an unprecedented ability to fine tune even the quickest pulses of light for a host of applications, and could render traditional instruments for measuring light beams obsolete. (2018-07-11)

Researchers improve conductive property of graphene, advancing promise of solar technology
Among researchers, graphene has been the hottest material for a decade. Now, two researchers from the University of Kansas have connected a graphene layer with two other atomic layers (molybdenum diselenide and tungsten disulfide) thereby extending the lifetime of excited electrons in graphene by several hundred times. The work may speed development of ultrathin and flexible solar cells with high efficiency. (2018-07-09)

Kirigami-inspired technique manipulates light at the nanoscale
Nanokirigami is based on the ancient arts of origami (making 3D shapes by folding paper) and kirigami (which allows cutting as well as folding) but applied to flat materials at the nanoscale. Now, researchers at MIT and in China have applied this approach to the creation of nanodevices to manipulate light, potentially opening new possibilities for light-based communications, detection, or computational devices. (2018-07-06)

Breaking the bond: To take part or not?
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction. (2018-07-06)

'Molecular movie' captures chemical reaction on atomic scale
A team of physicists from the University of Nebraska-Lincoln, Stanford University and Europe has captured the clearest glimpse yet of a photochemical reaction -- the type of light-fueled molecular transformations responsible for photosynthesis, vision and the ozone layer. Appearing in the June 6 edition of the journal Science, the team's study marks the culmination of a years-long effort to advance the quality of 'molecular movies' from that of a rudimentary stop-motion animation to a high-definition motion picture. (2018-07-05)

Researchers upend conventional wisdom on thermal conductivity
Researchers from around the United States have reported that a crystal grown from two relatively common mineral elements -- boron and arsenic -- demonstrates far higher thermal conductivity than any other semiconductors and metals currently in use, including silicon, silicon carbide, copper and silver. (2018-07-05)

Photonic capsules for injectable laser resonators
A KAIST research group presented photonic capsules for injectable laser resonators using microfluidic technology. The capsule's diameter is comparable to a human hair and stable in gas and liquid media, so it is injectable into any target volume. (2018-07-05)

Even phenomenally dense neutron stars fall like a feather
Harnessing the exquisite sensitivity of the National Science Foundation's Green Bank Telescope (GBT), astronomers have given one of Einstein's predictions on gravity its most stringent test yet. By precisely tracking the meanderings of three stars in a single system -- two white dwarf stars and one ultra-dense neutron star -- the researchers determined that even phenomenally compact neutron stars 'fall' in the same manner as their less-dense counterparts, an aspect of nature called the 'Strong Equivalence Principle.' (2018-07-04)

Caffeine offers clues to ultra-transient positive charges' migration
Caffeine keeps physicists up at night. Particularly those concerned with the capacity of electrons to absorb energy. In a new study published in EPJ B, a Franco-Japanese team of physicists have used the caffeine molecule as a playground to test the effect of ionising radiation on its electrons as they approach excited states. (2018-07-04)

A bright and vibrant future for seismology
Fiber-optic cables can be used to detect earthquakes and other ground movements. The data cables can also pick up seismic signals from hammer shots, passing cars or wave movements in the ocean. This is the result of a study appearing in the journal Nature Communications on July 3, 2018. Main authors are Philippe Jousset and Thomas Reinsch from GFZ German Research Centre for Geosciences. They carried out the investigation together with colleagues from Island, UK, Berlin, Germany, and Potsdam, Germany. (2018-07-03)

Sandia light mixer generates 11 colors simultaneously
A multicolor laser pointer you can use to change the color of the laser with a button click -- similar to a multicolor ballpoint pen -- is one step closer to reality thanks to a new tiny synthetic material made at Sandia National Laboratories. Research on the new light-mixing metamaterial was published in Nature Communications earlier today. (2018-06-28)

Atomic movie of melting gold could help design materials for future fusion reactors
Researchers at the Department of Energy's SLAC National Accelerator Laboratory have recorded the most detailed atomic movie of gold melting after being blasted by laser light. The insights they gained into how metals liquefy have potential to aid the development of fusion power reactors, steel processing plants, spacecraft and other applications where materials have to withstand extreme conditions for long periods of time. (2018-06-28)

Probing nobelium with laser light
Sizes and shapes of nuclei with more than 100 protons were so far experimentally inaccessible. Laser spectroscopy is an established technique in measuring fundamental properties of exotic atoms and their nuclei. For the first time, this technique was now extended to precisely measure the optical excitation of atomic levels in the atomic shell of three isotopes of the heavy element nobelium. This was reported by an international team lead by scientists from GSI Helmholtzzentrum für Schwerionenforschung. (2018-06-27)

Beer. Soup. Barley's next great use? A medical imaging drink
Roasted barley, when struck by a common laser beam, can illuminate the throat and the gastrointestinal track. The discovery could improve our ability to diagnose swallowing disorders, which affect more than 15 million Americans, as well as gut disorders. What's more, because many human diets already include barley, it could be fast-tracked for medical use. (2018-06-27)

Closing the gap: On the road to terahertz electronics
A team headed by the TUM physicists Alexander Holleitner and Reinhard Kienberger has succeeded for the first time in generating ultrashort electric pulses on a chip using metal antennas only a few nanometers in size, then running the signals a few millimeters above the surface and reading them in again a controlled manner. The technology enables the development of new, powerful terahertz components. (2018-06-26)

Fluorescence imaging technique goes from micro to macro, moves closer to clinic
Researchers have scaled up a powerful fluorescence imaging technique used to study biological processes on the cellular level. (2018-06-26)

Control of quantum state of optical phonon in diamond induced by ultrashort light pulses
Ultrashort Light-pulse-induced vibrations of atoms in a lattice, called optical coherent phonons, have been controlled in various materials. However, different experiments demonstrating such control have been explained differently through empirical theories, and a unified theory based on quantum mechanics is lacking. Scientists at Tokyo Institute of Technology successfully formulated a unified theory for this phenomenon and experimentally verified it in diamond, the optical phonons of which have great potential for application in quantum information technology (2018-06-25)

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