Electromagnetic Waves Current Events

Electromagnetic Waves Current Events, Electromagnetic Waves News Articles.
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When it comes to antennas, size matters
In a paper published online in Nature Communications, Nian Sun, professor of electrical and computer engineering at Northeastern, and his colleagues describe a new approach to designing antennas. The discovery enables researchers to construct antennas that are up to a thousand times smaller than currently available antennas, Sun said. (2017-08-29)

Physicists uncover the topological origin of surface electromagnetic waves
In work that provides insights for several areas of wave physics -- Maxwell electromagnetism, topological quantum states, and plasmonics/metamaterials -- scientists showed that the well-known surface electromagnetic waves at interfaces between homogeneous isotropic media, obtained within classical Maxwell's electromagnetism, also have a purely topological origin, similar to quantum topological states. (2019-02-04)

NYU researchers take magnetic waves for a spin
Researchers at New York University have developed a method for creating and directing fast moving waves in magnetic fields that have the potential to enhance communication and information processing in computer chips and other consumer products. (2014-01-29)

Scientists create artificial mini 'black hole'
Chinese researchers have successfully built an electromagnetic absorbing device for microwave frequencies. The device, made of a thin cylinder comprising 60 concentric rings of metamaterials, is capable of absorbing microwave radiation, and has been compared to an astrophysical black hole (which, in space, soaks up matter and light). (2010-06-03)

New lens device will shrink huge light waves to pinpoints
Manipulating light waves, or electromagnetic radiation, has led to many technologies, from cameras to lasers to medical imaging machines that can see inside the human body. (2007-07-12)

University of Toronto study charts new realm of physics
By constructing artificial materials that break long-standing rules of nature, a University of Toronto researcher has developed a flat lens that could significantly enhance the resolution of imaged objects. This, in turn, could lead to smaller and more effective antennas and devices for cell phones, increased space for data storage on CD-ROMs and more complex electronic circuits. (2003-03-19)

Scientists invent a new method of generating intense short UV vortices
An international group of scientists, including Skoltech Professor Sergey Rykovanov, has found a way to generate intense 'twisted' pulses. The vortices discovered by the scientists will help investigate new materials. The results of their study were published in the prestigious journal, Nature Communications. (2020-01-23)

Invisibility cloak to be unveiled with new research
New research is aiming to transform the fiction of invisibility and turn it into reality. (2011-07-06)

RUDN mathematicians confirmed the possibility of data transfer via gravitational waves
RUDN mathematicians analyzed the properties of gravitational waves in a generalized affine- metrical space (an algebraic construction operating the notions of a vector and a point) similarly to the properties of electromagnetic waves in Minkowski space-time. It turned out that there is the possibility of transmitting information with the help of nonmetricity waves and transferring it spatially without distortions. The discovery can help the scientists master new means of data transfer in space, e.g. between space stations. (2018-10-10)

Researchers discover anti-laser masquerading as perfect absorber
Researchers at Duke University have discovered that a perfect absorber of electromagnetic waves they described in a 2017 paper can easily be tweaked into a sort of 'time-reversed laser' known as a coherent perfect absorber (CPA). (2019-02-15)

Physicists design ultrafocused pulses
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy. (2017-07-27)

Temporal aiming with temporal metamaterials
Achieving a controllable manipulation of electromagnetic waves is important in many applications. Towards this goal, scientists from the UK and USA have proposed a new way to control the direction of wave-propagation in real time using temporal metamaterials having temporal permittivities that are rapidly changed in time from isotropic to anisotropic values. This new technique, which the authors named temporal aiming, will open new avenues for future real-time manipulation of electromagnetic waves using 4D metamaterial platforms. (2020-07-21)

Dielectric metamaterial is dynamically tuned by light
Researchers at Duke University have built the first metal-free, dynamically tunable metamaterial for controlling electromagnetic waves. The approach could form the basis for technologies ranging from improved security scanners to new types of visual displays. While previous metamaterials control electromagnetic waves through their electric properties, the new technology can also manipulate them through their magnetic properties. It won't melt and can be reconfigured on the fly. (2018-05-01)

Researchers create & control spin waves, lifting prospects for enhanced info processing
A team of NYU and University of Barcelona physicists has developed a method to control the movements occurring within magnetic materials, which are used to store and carry information. The breakthrough could simultaneously bolster information processing while reducing the energy necessary to do so. (2014-11-17)

Sheer protection from electromagnetic radiation
A printable ink that is both conductive and transparent can also block radio waves. (2020-11-01)

Measurements reveal a two-step energy flow process in Earth's magnetosphere
Scientists have obtained in situ measurements of Earth's magnetosphere, demonstrating a phenomenon that's long been thought to happen but not yet directly been shown: energy is transferred from hydrogen ions to plasma waves, and then from the waves to helium ions. (2018-09-06)

Absorbing electromagnetic energy while avoiding the heat
Electrical engineers at Duke University have created the world's first structured metamaterial made without metal that can absorb electromagnetic energy. The advance has direct applications in imaging, sensing and lighting. (2017-01-27)

Taming tiny, unruly waves for nano optics
Nanoscale devices present a unique challenge to any optical technology -- there's just not enough room for light to travel in a straight line. As light waves are pressed through surfaces only a few nanometers apart (smaller than their wavelength), they become unstable and difficult to predict. But Georgia Tech researchers have discovered a method of predicting the behavior of light on the nanoscale during radiation heat transfer, opening the door to the design of a spectrum of new nanodevices and technologies. (2007-10-08)

Spinning lightwaves on a one-way street
Researchers at Purdue University have created a quantum spin wave for light. This can be a carrier of information for future nanotechnologies but with a unique twist: they only flow in one direction. (2019-08-19)

New algorithm could mean more efficient, accurate equipment for Army
Researchers working on an Army-funded project have developed an algorithm to simulate how electromagnetic waves interact with materials in devices to create equipment more efficiently and accurately. The algorithm could be used in a wide range of fields -- from biology and astronomy to military applications and telecommunications. (2019-12-19)

Bridging the gap between the quantum and classical worlds
Strong coupling in specific light-matter interactions, previously believed to be a quantum phenomenon, is explained with classical models and experiments. (2016-08-02)

Discovery of topological LC circuits transporting EM waves without backscattering
NIMS succeeded in fabricating topological LC circuits arranged in a honeycomb pattern where electromagnetic (EM) waves can propagate without backscattering even when pathways turn sharply. These circuits may be suitable for use as high-frequency electromagnetic waveguides, which would allow miniaturization and high integration in various electronics devices, such as mobile phones. (2018-12-26)

Testing the James Webb Space Telescope with radio waves
The instruments that will fly aboard NASA's James Webb Space Telescope not only have to be tough enough to survive in the cold of space, but they also have to work properly in the electromagnetic environment on the spacecraft, so they're tested for both. Recently, they passed a test for the latter in a very unique room. (2016-01-06)

Theoretical blueprint for invisibility cloak reported
Using a new design theory, researchers at Duke University's Pratt School of Engineering and Imperial College London have developed the blueprint for an invisibility cloak. Once devised, the cloak could have numerous uses, from defense applications to wireless communications, the researchers said. (2006-05-25)

'Invisibility cloaks' could break sound barriers
Contrary to earlier predictions, Duke University engineers have found that a three-dimensional sound cloak is possible, at least in theory. (2008-01-09)

Intelligent metamaterials behave like electrostatic chameleons
Chinese physicists have developed so-called metashells made of smart, adaptable metamaterials. In a recent study published in EPJ B, they show how hollow metamaterial shells can adapt to the characteristics of the materials they hold inside. (2019-04-02)

Torquato research links elastodynamic and electromagnetic wave phenomena
Princeton's Salvatore Torquato, the Lewis Bernard Professor of Natural Sciences and director of the Complex Materials Theory Group, published research this week in the Proceedings of the National Academy of Sciences (PNAS) linking wave phenomena that has never previously been linked. For the first time, the research employs a unified approach that melds the behavior of elastodynamic (sound) waves with that of electromagnetic (light) waves as they propagate through heterogeneous, or composite, materials. (2020-04-09)

Study reveals the Great Pyramid of Giza can focus electromagnetic energy
Scientists applied methods of theoretical physics to investigate the electromagnetic response of the Great Pyramid to radio waves. Scientists predicted that under resonance conditions the pyramid can concentrate electromagnetic energy in its internal chambers and under the base. The research group plans to use these theoretical results to design nanoparticles capable of reproducing similar effects in the optical range. The study was published in the Journal of Applied Physics. (2018-07-30)

Combined observations of neutron stars constrain their equation of state and the Hubble constant
Combining signals from multiple observations of neutron stars has allowed researchers to better understand the properties of ultra-dense matter and constrain the Hubble constant, which describes how fast the Universe is expanding, according to a new study. (2020-12-17)

Dartmouth-led study explores wave-particle interaction in atmosphere
A Dartmouth-led study sheds light on the impact of plasma waves on high-energy electrons streaking into Earth's magnetic field from space. (2015-10-27)

Beyond the looking glass
While the researchers can't promise delivery to a parallel universe or a school for wizards, books like Pullman's Dark Materials and JK Rowling's Harry Potter are steps closer to reality now that researchers in China have created the first tunable electromagnetic gateway. (2009-08-13)

'Conductive concrete' shields electronics from EMP attack
University of Nebraska engineers Christopher Tuan and Lim Nguyen have developed a cost-effective concrete that shields against intense pulses of electromagnetic energy. They have agreed to license their new technology to a developer of disaster-resistant structures. Tuan and Nguyen continue to investigate additional uses for conductive concrete, including improving de-icing and radiant heating. (2016-11-14)

'Magnonic nanoantennas': optically-inspired computing with spin waves one step closer
A new methodology for generating and manipulating spin waves in nanostructured magnetic materials opens the way to developing nano-processors for extraordinarily quick and energy efficient analog processing of information. (2020-03-05)

Thin, active invisibility cloak demonstrated for first time
Invisibility cloaking is no longer the stuff of science fiction: two researchers in The Edward S. Rogers Sr. Department of Electrical & Computer Engineering have demonstrated an effective invisibility cloak that is thin, scalable and adaptive to different types and sizes of objects. (2013-11-12)

NASA listens in as electrons whistle while they work
NASA's Van Allen Probes have observed a new population of space sound waves, called plasmaspheric hiss, which are important in removing high-energy particles from around Earth that can damage satellites. (2017-07-17)

New study reveals communications potential of graphene
Providing secure wireless connections and improving the efficiency of communication devices could be another application for graphene, as demonstrated by scientists at Queen Mary University of London and the Cambridge Graphene Centre. (2014-02-19)

Wits team involved in international breakthrough in astronomical observation
For the first time in history, Wits researchers have witnessed electromagnetic signals that are associated with the gravitational wave emission from the coalescence of two massive neutron stars. (2017-10-17)

Engineered metasurfaces reflect waves in unusual directions
Researchers at Aalto University have developed new metasurfaces for the arbitrary manipulation of reflected waves, essentially breaking classical reflection law to engineer it at will. (2019-02-16)

Scientists closer to making invisibility cloak a reality
A paper published in the March 2009 issue of SIAM Review, (2009-03-05)

Catching the wave -- Researchers measure very short laser pulses
Scientists have perfected a technique for very accurately measuring and controlling the electromagnetic waves within some of the shortest laser pulses ever made, says new research published today. Being able to fully understand and control these laser pulses represents an important step towards using them to track and manipulate electrons in leading-edge research at the sub-atomic level. (2006-12-03)

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