Articles tagged with Electromagnetic Waves
Researchers at ITMO University and Australian National University created an invisible cylindrical object in the microwave range without metamaterial coatings. The method is based on Fano resonances, where waves scattered via resonant and non-resonant mechanisms have opposite phases and are mutually destroyed.
Dr. Martin Weides of KIT is awarded EUR 2 million over five years to study dynamic processes in ferromagnets, which could lead to magnetic data processing components. He aims to understand damping and intrinsic rotations of individual electrons using quantum bits.
Scientists generate Moebius strip from laser light to process materials and manipulate microparticles, opening up new possibilities for nanotechnology. The optical tool could also be used to guide nanoparticles on complex paths using optical tweezers.
A new study by scientists from Bangladesh explores the viability of a novel structure for generating high-power microwaves, offering an alternative to traditional approaches. The proposed semi-circular slow wave structure is capable of producing high-power microwaves via ultra-high-frequency radio waves.
The study establishes form-invariance of electromagnetic, sound, and elastic wave equations without assuming relations between field variables. New locally accurate elastodynamic equations for inhomogeneous media are derived, leading to the design of perfect elastic wave rotators and cloaks.
The study proposes various compact devices capable of redirecting electromagnetic waves with high efficiency, opening up new ways of miniaturizing components and controlling light. The work utilizes ENZ metamaterials to achieve super coupling, tunnel effect, and confining energy in tiny spaces.
A novel metamaterial enables fast, efficient and high-fidelity terahertz radiation imaging system capable of manipulating electromagnetic waves. The device uses a series of filter-like masks to retrieve multiple samples of a terahertz scene, which are reassembled by a single-pixel detector.
Northwestern University scientists have developed a compact, room-temperature terahertz radiation source, six times more efficient than previous systems. This breakthrough enables easier harnessing of terahertz waves, potentially leading to advances in biosensing, homeland security, and space research.
Researchers at TU Vienna develop a new method to utilize quantum mechanical vibrations for high precision measurements in complex multi-particle systems. They successfully control hundreds of Rubidium atoms in an ultracold Bose-Einstein condensate, enabling the use of collective motional states for interferometric measurements.
Researchers at MIT describe a new technique that could reduce the number of sensors needed for terahertz or millimeter-wave imaging by a factor of 10, enabling more practical high-resolution imaging systems. The technique exploits the sparsity of scenes in certain ranges, allowing for efficient reconstruction without aliasing.
A team of researchers from China's State Key Lab of Mechanics and Control of Mechanical Structures introduced innovative strategies for ultrasonic manipulation by employing various acoustic streaming fields. This enables the diversification of manipulation functions and samples, widening the application range of the technique.
A team of researchers at RIKEN Center for Emergent Matter Science discovered that evanescent electromagnetic waves carry momentum and spin components orthogonal to the direction of wave propagation. These findings offer a unique opportunity to investigate fundamental physical features, previously hidden in usual propagating light.
Researchers have created an acoustic field rotator, a device that manipulates sound waves, using metamaterials. The device can rotate sound waves in a manner similar to electromagnetic or liquid wave counterparts, which could improve the operation of medical ultrasound machines and enhance image quality.
A NASA-funded sounding rocket will launch into the aurora borealis to gather data on its formation and behavior. The mission, GREECE, aims to understand the sun-Earth connection and how energy particles interact with Earth's magnetosphere.
Researchers at the University of Pennsylvania propose a new theoretical framework for metamaterials that can perform 'photonic calculus' on light waves, enabling fast and efficient calculations. This technology could revolutionize fields such as image processing by allowing real-time manipulation of light wave profiles without conversi...
Researchers have developed a new holographic process that utilizes an image-stabilized X-ray camera to improve imaging efficiency and resolution. The method, which uses a Fresnel zone plate to increase brightness, enables the study of fast dynamic processes at the nanoscale.
Researchers developed graphene-based nano-antennas that can connect devices powered by small amounts of scavenged energy, enabling nanoscale communication. The antennas operate at lower frequencies than traditional metallic components, reducing power needs.
The study found that low-frequency waves, known as Ultra-low frequency (ULF) waves, accelerate particles in the radiation belts to near-light speed. This mechanism has important implications for understanding cosmic particle acceleration throughout the universe.
Researchers develop technique to make curved surfaces appear flat to electromagnetic waves, enabling bespoke antenna design for increased efficiency and reduced weight. This breakthrough could lead to ultra-fast wireless communication over surface in near future.
Researchers using Van Allen Probes discovered ultra-fast particles driving a previously unknown configuration of three bands in the Earth's radiation belts. Computer simulations show that one common acceleration method doesn't apply to these particles.
Scientists have discovered a massive particle accelerator in the Van Allen radiation belts, revealing that particles are sped up by a local energy source. This discovery answers a longstanding question and will help make predictions of space weather conditions.
Scientists have discovered a massive particle accelerator in the heart of the Van Allen radiation belts, accelerating particles to over 99% the speed of light. Local energy sources within the belts cause the acceleration, like a perfectly timed push on a moving swing.
Scientists at the University of Adelaide have created a novel structure that traps terahertz waves in tiny holes to produce higher contrast imaging. This breakthrough has the potential to enhance the sensitivity of medical diagnostic and security scanners, leading to more accurate cancer detection and improved homeland security.
Researchers developed a single-pixel imaging technique using coded apertures to quickly manipulate THz waves, producing high-fidelity images in seconds. The technique has the potential to revolutionize areas like chemical fingerprinting, security imaging, and real-time skin cancer detection.
A team of Stanford engineers has created a thin, flexible 'skin' that can monitor heart health, detecting stiff arteries and cardiovascular problems. The device is sensitive enough to track changes in the pulse wave, which could lead to more detailed diagnostics in the future.
Researchers create compact, affordable terahertz scanning technology using CMOS technology, enabling applications in homeland security, wireless communications, healthcare, and touchless gaming. The new chips generate powerful signals that can penetrate various materials without ionizing damage.
Researchers at Duke University have created a more efficient cloaking device by reducing reflections and increasing wave transmission. The new design uses a diamond-shaped pattern with copper strips to guide electromagnetic waves around an object, eliminating loss due to reflections.
Physicists at the University of Bristol have made a significant breakthrough in understanding the nature of light by demonstrating its wave-particle duality. The experiment, published in Science, shows that photons can exhibit both wave-like and particle-like behavior simultaneously, resolving a long-standing debate in quantum mechanics.
Scientists at Harvard University have developed a new technique to achieve negative refraction in metamaterials, resulting in an 'extraordinarily strong' negative refractive index as large as -700. This breakthrough enables the localization of electromagnetic waves into ultra-subwavelength scales and dramatically reduces size.
Researchers have discovered a type of plasma wave moving faster than expected, suggesting electrical instabilities may be driving the waves. This finding could lead to a better understanding of how heat and energy are transferred through plasma.
A team of international mathematicians has devised an amplifier that can boost light, sound, or other waves while hiding them inside an invisible container. The researchers propose using this technology to manipulate matter waves, which could enable the creation of a quantum microscope to monitor electronic processes on computer chips.
Researchers have developed a 'thermal' approach to invisibility cloaking that isolates or cloaks objects from sources of heat. The method uses transformation optics to control thermal diffusion, allowing for the shielding of areas from heat and the concentration of heat in small volumes.
Researchers have developed a way to create stronger and more efficient continuous wave T-rays, which can detect biological phenomena such as increased blood flow around tumorous growths. The new technology could lead to innovations similar to the 'tricorder' scanner used in Star Trek, enabling faster and more convenient medical scanning.
Researchers developed a new technique called Electromechanical Wave Imaging (EWI) that can map transient events and image the entire heart within a single beat. This allows for non-invasive diagnosis of non-periodic arrhythmias like atrial and ventricular fibrillation.
Cooperative communications technology allows multiple single-antenna terminals to share their antennas, creating a virtual antenna array. This enables the exploitation of spatial resource in traditional MIMO techniques without requiring multiple antennas. Distributed space-time coding (DSTC) has emerged as an efficient technique for pr...
Researchers at PPPL developed a high-resolution X-ray imaging crystal spectrometer to observe the effects of radiofrequency waves on plasma behavior. The spectrometer revealed self-generated and RF-driven flow, which could be beneficial for fusion research and future reactors.
Researchers have developed a reflective 'carpet cloak' made of silicon oxide and silicon nitride, which conceals an object under layers and bends light waves around it. The device demonstrates the possibility of actual invisibility for the light seen by the human eye, surpassing previous infrared-based demonstrations.
A £4.5m research project led by Queen Mary University of London aims to transform invisibility science into practical technology using spatial transformations. The project will focus on developing practical applications for communication, wireless energy transfer, sensors, and security.
A Rensselaer Polytechnic Institute doctoral student has developed a novel method to extend the distance of terahertz technology's effective detection range using sound waves. The technique allows for safer detection of hidden explosives, chemicals, and other materials from several meters away.
Benjamin Clough, a doctoral student at Rensselaer Polytechnic Institute, has developed a novel method for eavesdropping on terahertz information hidden in invisible plasma acoustic bursts. His technique uses sound waves to boost the distance from which researchers can use powerful terahertz technology to remotely detect hidden explosiv...
Researchers developed a groundbreaking nano-laser called Spaser, which can be as small as needed to fuel future technologies. The device uses surface plasma waves, allowing it to operate at speeds 100 times greater than current devices.
Scientists have developed a new method to monitor groundwater aquifers using satellite data, allowing for more accurate and cost-effective management of these vital resources. By analyzing satellite measurements over time, researchers can infer the amount of water in an aquifer, providing valuable insights for hydrologists and regulato...
Researchers at MIT have created computer models that show a face shield can significantly reduce traumatic brain injury by impeding direct transmission of blast waves to the face. The study's findings offer a potential solution for preventing head injuries sustained by US troops during explosions.
Artificial black holes made with metamaterials can trap EM waves, preventing them from escaping like a black hole traps light. This technology could be used to measure how light is absorbed when passing through the material and enable the harvesting of light for solar cells.
Scientists have observed Alfvén waves in the solar wind that point perpendicular to the magnetic field, efficiently transferring energy to protons. These waves play a crucial role in heating protons and explaining the solar wind's temperature changes.
A new, all-optical system using terahertz wave technology can identify unique 'fingerprints' of hidden materials, enabling detection of explosives, chemical and biological agents, and illegal drugs from a distance. The technique uses laser-induced fluorescence to convey information about target materials.
Researchers in China develop electromagnetic absorbing device for microwave frequencies using metamaterials, demonstrating an absorption rate of 99%. The device traps and converts electromagnetic waves into heat, exhibiting properties similar to an 'electromagnetic black hole',
Researchers explore cosmic microwave radiation as favored method to detect primordial gravitational waves, offering a potentially new probe of early universe cosmology. The discovery could provide a dramatic new window on the origin and evolution of the universe.
Peter Kuchment, a leading researcher at Texas AüM University, is developing mathematical tools for improved medical imaging methods. Hybrid imaging methods like photoacoustic imaging aim to combine the strengths of different imaging modalities, enhancing tumor detection and treatment options.
Researchers at KIT have successfully manufactured the world's smallest optical nanoantennas from gold using electron beam lithography. These nanoantennas enable rapid information transmission and are considered a major basis for new optical high-speed data networks.
Researchers create new cloaking technique that uses electromagnetic fields to protect objects from incoming waves. The method has potential applications in shielding submarines, planes, buildings and coastal structures from various threats.
Researchers develop a mathematical model for cloaking objects using metamaterials, which can bend light waves around regions to create an 'invisible' space. This technology has potential applications in secure communication, medical procedures, and even three-dimensional television screens.
A new amplifier invented at UC San Diego has the potential to revolutionize high capacity wireless communications systems. The Cascaded Constructive Wave Amplifier can amplify signals at millimeter wave frequencies, enabling data transfer rates of up to 10 Gigabits per second over a kilometer.
Scientists at the University of Liverpool have developed a metamaterial structure that guides water through concentric corridors, reducing wave overtopping and damage to coastal defenses. The 'invisibility cloak' technology shows promise in protecting land from natural disasters such as tsunamis.
Researchers at Penn have developed a theoretical framework for increasing the speed of light pulses in nanoscale metal chains, potentially enabling high-speed optical computing. The discovery may overcome limitations in optics and pave the way for novel optoelectronic devices.
Researchers at Lawrence Livermore National Laboratory have developed a new technique to visualize high-frequency acoustic waves in nanostructures, such as LED lights. By combining molecular dynamics simulations with terahertz (THz) radiation, they can detect these waves and gain insights into the dynamics of crystals under ultra-high s...
Researchers at Duke University have successfully created a three-dimensional sound cloak in theory, allowing sound waves to travel around it undistorted. This breakthrough could lead to improved acoustics in concert halls and hidden submarines from sonar detection.
Researchers suggest that large earthquakes emit electromagnetic signals days or weeks before they strike, potentially providing early warnings. However, the scientific community needs to take notice and verify these findings.
Researchers performed the world's smallest double slit experiment using a hydrogen molecule, demonstrating classical behavior at the quantum level. The results show that quantum particles start behaving in a classical way on a scale as small as a single hydrogen molecule.
Georgia Tech researchers develop method to predict evanescent wave behavior in nanoscale radiation heat transfer, enabling design of new nanodevices and technologies. The discovery opens path for various applications, including solar thermal energy technologies.