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Metamaterials

All articles tagged with #metamaterials

Metamaterial MRI Antenna Delivers Sharper Eye and Brain Imaging on Existing Scanners
technology14 days ago

Metamaterial MRI Antenna Delivers Sharper Eye and Brain Imaging on Existing Scanners

Researchers at the Max Delbrück Center and Rostock University Medical Center unveiled a metamaterial-based MRI antenna that strengthens signals from deep tissues, enabling higher-resolution images of the eye and occipital brain regions and potentially shorter scan times without new equipment. Tested at 7.0 Tesla on volunteers, the compact antenna can be adapted to different body parts, may help reduce heating near implants, and could enhance MRI-guided therapies; larger clinical studies are planned and the approach targets broader organ imaging in the future.

via SciTechDaily|
#brain-imaging#eye-imaging#medical-imaging
Roll-to-roll printable metamaterials unlock multiscale, tunable colouration
technology1 month ago

Roll-to-roll printable metamaterials unlock multiscale, tunable colouration

Researchers demonstrate a printable meta-assembly strategy that embeds low-cost polystyrene nanoparticles in a PDMS matrix to form a nanolattice-based microconic optical interface. This design enables precise coupling of guided and reflected waves to produce tunable color patterns across seven orders of length scale, achievable with metre-scale, single-pixel customization via continuous roll-to-roll manufacturing. By adjusting nanoparticle size and the printed feature diameter, designers can tailor color separation and integration, yielding vibrant, stable colors suitable for eco-friendly coloration, intelligent displays, and information security. The work showcases scalable, designable metamaterials and proves robustness under UV, heat, solvents, washing, and mechanical deformation.

via Nature|
#metamaterials#multiscale-photonics#printable-meta-assemblies
Electromagnetic Time Mirrors Demonstrated in Breakthrough Experiment
science4 months ago

Electromagnetic Time Mirrors Demonstrated in Breakthrough Experiment

Researchers at City University of New York demonstrated temporal reflection by abruptly shifting a metamaterial's impedance, creating a time-reversed copy of an electromagnetic signal inside a fixed system— the first experimentally observed time mirror. Published in Nature Physics, the result confirms a long-theorized effect in time-varying photonic media and hints at future applications in encryption and adaptive antennas, though practical scaling and energy constraints remain hurdles; time itself remains unaffected outside the device.

via Indian Defence Review|
#electromagnetic-waves#metamaterials#photonics
Multicolor Metalenses Promise to Transform Camera Technology
technology8 months ago

Multicolor Metalenses Promise to Transform Camera Technology

Researchers have developed layered multicolor metalenses using stacked metamaterials that can focus multiple wavelengths simultaneously, overcoming the limitations of single-layer lenses. This innovative design is easy to manufacture, polarization insensitive, and scalable, with potential applications in compact, high-performance optical devices for drones, smartphones, and other portable technologies.

via SciTechDaily|
#metalenses#metamaterials#multicolor
"Solitons: Time, Space, and Rule Bending"
science-and-technology2 years ago

"Solitons: Time, Space, and Rule Bending"

Researchers from the University of Amsterdam have demonstrated the unique behavior of topological solitons in a robotic metamaterial, showing that they can be harnessed through non-reciprocal interactions to control the movement of robots, sense their surroundings, and communicate. The solitons, which behave like particles but retain their shape and cannot disappear, are being studied for their potential applications in materials science, robotics, and engineering, offering new possibilities for self-propelled motion and advanced functionality.

via SciTechDaily|
#materials-science#metamaterials#non-reciprocal-interactions
"Revolutionary 3D-Printed Titanium Lattice: Unprecedented Strength Achieved"
technology2 years ago

"Revolutionary 3D-Printed Titanium Lattice: Unprecedented Strength Achieved"

Researchers from RMIT University have developed a new 3D printed titanium lattice structure that is 50% stronger than the strongest alloy with similar density used in aerospace applications. The structure, a metamaterial, was created using a hollow-strut lattice design and additive manufacturing-driven approach, enabling it to evenly distribute load stress and enhance its strength and structural efficiency. The material offers potential applications in medical implants and aerospace components, and the researchers plan to further optimize it for higher-temperature environments. This development showcases the potential of 3D printing in creating highly durable metal lattices, with other research teams also exploring similar applications.

via 3D Printing Industry|
#3d-printing#additive-manufacturing#aerospace
"MIT's Unbreakable Microscopic Metamaterials Resist Supersonic Impacts"
science-and-technology2 years ago

"MIT's Unbreakable Microscopic Metamaterials Resist Supersonic Impacts"

MIT engineers are conducting high-speed experiments to test the resilience of microscopic metamaterials against supersonic impacts, finding that specific microstructures outperform solid materials in resisting such impacts. By firing microparticles at supersonic speeds, the team identified metamaterial architectures that are more resilient to impacts, with some structures being able to withstand impacts up to twice as much as bulk material. The researchers hope to use this rapid testing method to identify new metamaterial designs for stronger and lighter protective gear, garments, coatings, and paneling.

via SciTechDaily|
#metamaterials#microscopic-engineering#mit