Articles tagged with Wave Propagation
Researchers studied dipole eddies in the South China Sea, revealing unique sound-speed structures and acoustic propagation patterns. The team found that warm-core AEs decrease temperature, salinity, and sound speed, while cold-core CEs increase these factors.
Researchers at Tohoku University discovered a novel propagation phenomenon in surface acoustic waves, leading to the development of innovative acoustic devices. The study, published in Physical Review Letters, reveals asymmetrical diffraction behavior that can be controlled using magnetic fields.
Researchers at Princeton Plasma Physics Laboratory have developed a technique to prevent unwanted waves that siphon off needed energy, increasing the efficiency of fusion reactions. Positioning a metal grate at a slight angle enhances heat put into the plasma and reduces slow modes, leading to more powerful and efficient fusion heating.
The Crab Pulsar features a unique zebra pattern due to diffraction in the electromagnetic pulses caused by its dense plasma. Researchers have proposed various emission mechanisms, but none have convincingly explained the observed patterns until now.
Researchers at Newcastle University developed a novel approach using electromagnetic waves to solve partial differential equations, specifically the Helmholtz wave equation. The innovative structure, known as a metatronic network, effectively behaves like a grid of T-circuits and allows for control over PDE parameters.
Researchers at Yokohama National University have developed a novel platform for electrical-to-spin conversion using spin-wave reservoir chips. These devices improve learning accuracy and short-term memory tasks by transforming electrical signals into corresponding spin-wave representations.
Researchers studied the 4.8-magnitude Tewksbury earthquake, which surprised millions with its strong shaking reports despite minimal damage near the epicenter. The study found that the rupture direction may have funneled the shaking away from the epicenter and toward the northeast.
Researchers at Macquarie University developed a new software package, TMATSOLVER, that accurately models complex wave scattering for metamaterial design. The tool enables rapid prototyping and validation of new metamaterial designs, accelerating research and development in this growing global market.
A team of researchers at ETH Zurich created a method to suppress sound wave propagation in the backward direction without deteriorating forward propagation. They achieved this using self-oscillations and a circulator, which allows sound waves to travel only one way.
Researchers at UCLA have developed a wavelength-multiplexed diffractive optical processor that enables all-optical multiplane quantitative phase imaging. This approach allows for rapid and efficient imaging of specimens across multiple axial planes without the need for digital phase recovery algorithms.
Researchers developed a method to analytically express the performance of wireless communication systems when using reconfigurable intelligent surfaces (RIS). The model accurately predicted the effects of RIS on improving radio wave propagation environment, providing a useful guide for positioning RIS to receive stronger signals.
A recent study by the Hebrew University of Jerusalem developed a Free-Standing Microscale Photonic Lantern Spatial Mode (De-)Multiplexer using 3D Nanoprinting. The device enables spatial mode multiplexing, converting between optical waves and separated single-mode signals, with applications in high-capacity communication and imaging.
A groundbreaking study introduces a method for sorting vector structured beams with spin-multiplexed diffractive metasurfaces, promising significant advancements in optical communication and quantum computing. This technology enables precise control over complex light beams, opening new avenues for scientific exploration.
Researchers have introduced iso-propagation vortices, offering a solution to increasing information processing capacity while overcoming traditional vortex beam limitations. IPVs exhibit OAM-independent propagation, allowing for consistent beam size during free-space propagation.
Scientists have developed a new method to manipulate light using synthetic dimension dynamics, enabling precise control over light propagation and confinement. This breakthrough has significant implications for applications such as mode lasing, quantum optics, and data transmission.
Researchers found that coastal trapped waves and tidal mixing control primary production in the tropical Angolan upwelling system. Productivity peaks occur seasonally, with strong fluctuations during austral winter.
A research team led by HKU physicists has introduced a solution to address optical loss in polariton propagation using synthetic complex frequency waves. This approach enables more efficient light-based devices, improved accuracy in sensors and imaging techniques, and enhanced nanophotonic circuits.
A team of researchers at Ghent University and imec developed a silicon photonic temperature sensor that measures up to 180°C. The sensor was realized in the framework of the European SEER project, where partners focus on integrating optical sensors in manufacturing routines for composite parts.
A new approach for coupling different light modes enables unprecedented data transfer rates in an MDM system. By using a gradient-index metamaterial waveguide, researchers achieved a high coupling coefficient and created a 16-channel MDM communication system with a data transfer rate of 2.162 Tbit/s.
Scientists at CUNY ASRC have shown that photons can collide and interact, allowing for new technologies to be developed. This breakthrough enables the manipulation of wave propagation, benefiting wireless communications, imaging, computing, and energy harvesting technologies.
Researchers have developed an innovative approach to efficiently manipulate topological edge states for optical channel switching. By exploiting the finite-size effect in a two-unit-cell optical lattice, they achieved dynamic control over topological modes and demonstrated robust device performance.
Researchers determined the Martian crust's global structure using seismic data from a massive marsquake. The crust averages 42-56 kilometers in thickness, with variations between the northern and southern hemispheres.
An international team of scientists has imaged and analyzed THz waves propagating in form of plasmon polaritons along thin anisotropic semiconductor platelets. The wavelengths vary with direction, allowing for manipulation of light at the nanoscale.
A mobile application utilizing Python and a single-element ultrasound transducer has been developed for photoacoustic tomography (PAT) image reconstruction. The application successfully reconstructs high-quality images with signal-to-noise ratio values above 30 decibels, making it suitable for point-of-care diagnosis in low-resource se...
A research team at City University of Hong Kong invented a tunable terahertz meta-device that can control the radiation direction and coverage area of THz beams. The device allows for signal delivery to specific users or detectors and has flexibility to adjust the propagating direction, as needed.
Researchers detected significant thermospheric fluctuations with multiple wave modes after the Tonga eruption, affecting global neutral density up to 500 km altitude. The study suggests that gravitational waves, Lamb waves, and tsunami waves may transmit energy upward, influencing thermospheric density.
Researchers measured noise levels at locations around the launch pad, finding maximum sound levels exceeded predicted values by nearly 20 decibels. The study's findings will help validate and improve existing noise prediction models to protect equipment and surrounding environments.
University of Central Florida researchers observed de Broglie-Mackinnon wave packets, a long-standing theoretical concept, by exploiting a loophole in 1980's-era laser physics theorem. The team's use of space-time wave packets, which resist stretching in dispersive media, verifies predicted properties and opens the path to studying top...
Researchers have found evidence that high frequency brain waves in the motor cortex contain information about planned movements, providing a new understanding of how the brain controls movement. The study's findings could inform the development of brain-machine interfaces and reveal new insights into cortical function.
Researchers report the discovery of photonic hopfions, a new family of 3D topological solitons with freely tunable textures and numbers. These structures exhibit robust topological protection, making them suitable for applications in optical communications, quantum technologies, and metrology.
The largest earthquake on Mars, a 4.7 magnitude marsquake, revealed layers in the crust suggesting a massive meteoroid impact, with possible alternating volcanic and sedimentary rocks. This finding provides evidence for past collision events that shaped the planet.
Researchers developed high-capacity free-space optical links using unipolar quantum optoelectronic devices, achieving unprecedented data rates of up to 30 Gbit/s at 31-meter distances. The system's performance is resistant to weather conditions and showcases potential for fast, long-range optical links.
Scientists at the Max Planck Institute have developed a unidirectional device that significantly increases the quality of optical vortex signals. By transmitting selective optical vortex modes exclusively unidirectionally, they largely reduce detrimental backscattering to a minimum.
Scientists have detected seismic surface waves on Mars for the first time, providing new insights into the planet's crust and structure. The study estimates the average properties of the Martian crust between 3 to 18.6 miles below the surface, revealing faster seismic velocities that suggest compositional differences or reduced porosity.
Researchers at John Innes Centre found that amino acid waves, not calcium waves, mediate plant responses to stress. Glutamate released from wounds triggers a wave of calcium responses in plant tissues.
A team from Kyoto University has demonstrated that deep-water wave groups can propagate independently, regardless of interference. This finding challenges existing understanding of ocean waves and has implications for fields like offshore engineering and plasma physics.
Researchers conducted wave-optics simulations to study the impact of turbulence on light beams, finding that branch point density grows non-linearly with grid resolution. The study's results could lead to more accurate modeling and improved performance in Adaptive Optics systems.
Researchers use speaker shakers to generate vibrations in a plate, creating sound waves that constructively interfere at the target minifigure. The focused energy knocks over the single Lego minifig without disrupting the surrounding minifigs.
A team of researchers used X-ray measurements to study the behavior of waves in granular materials. The findings provide a better understanding of how particle arrangements and forces affect wave propagation. This knowledge is crucial for detecting earthquakes, locating oil and gas reservoirs, and designing acoustic insulation.
Researchers at the Institute for Basic Science discovered that asymmetric apertures can cause astigmatism in microscopes, leading to degraded image resolution. By correcting for this effect, they improved the technique of line-temporal focusing microscopy, achieving unprecedented resolution in biological structures.
Researchers used supercomputer simulations to study the behavior of mantle plumes, a key factor in volcanic formation. The study provided new insights into how plumes interact with seismic waves and could help guide future experiments on the ocean floor.
A team of researchers from MIPT and Ghent University has created a highly realistic model that can reproduce the complexity of the cardiac microstructure, enabling scientists to better understand the causes of fibrosis and its link to arrhythmia. The model's accuracy is due in part to its consideration of cell shapes and interactions.
A team of researchers from the University of Washington and the University of Arizona has received a $2 million NSF EFRI grant to study non-reciprocal elastic wave propagation in solids. The project aims to develop new materials with unique properties that could lead to breakthroughs in phononic information processing.
A team of researchers from Caltech and the University of Cambridge discovered that booming and burping sounds emanating from sand dunes are different acoustic phenomena governed by distinct physical principles. The study found that booming sounds originate from linear P-waves, while burping sounds correspond to surface Rayleigh waves.
A family of tri-diagonal compact schemes with independent dispersion and dissipation properties are developed to resolve flow fields with a wide range of length scales. The proposed scheme optimizes dispersion while controlling dissipation, allowing for more accurate simulations of compressible flows.
A team led by researchers at San Diego Supercomputer Center successfully completed record-setting, petascale-level simulations of the earth's inner structure. They achieved a shortest period of 1.15 seconds and 161 teraflops, using 149,784 cores.