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Metamaterials

All articles tagged with #metamaterials

Electromagnetic Time Mirrors Demonstrated in Breakthrough Experiment
science1 month 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
technology5 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-technology1 year 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
"Breakthrough: True One-Way Glass Achieved with Optical Metamaterial"
science-and-technology2 years ago

"Breakthrough: True One-Way Glass Achieved with Optical Metamaterial"

Researchers at Aalto University have developed a new optical metamaterial leveraging the nonreciprocal magnetoelectric effect, which allows for the creation of true one-way glass. This metamaterial, published in Nature Communications, can be fabricated using existing technology and conventional materials, unlike previous approaches. The potential applications of this technology include creating windows that provide one-way visibility regardless of external brightness, as well as improving the efficiency of solar cells by blocking thermal emissions.

via Phys.org|
#electromagnetic-waves#industrial-applications#metamaterials
"AI Tool Unveils Realistic Metamaterials with Unusual Properties"
science-and-technology2 years ago

"AI Tool Unveils Realistic Metamaterials with Unusual Properties"

Researchers from TU Delft have developed an AI tool that can discover and design realistic "metamaterials" with extraordinary properties, making them fabrication-ready and durable. These metamaterials, whose properties are determined by their structure rather than molecular composition, can exhibit unnatural and extreme properties, such as behaving like a fluid despite being solid. The AI tool uses deep-learning models to solve the complex "inverse problem" of finding the geometry that gives rise to desired properties, bypassing previous simplifying assumptions. This breakthrough could lead to new applications in orthopedic implants, surgical instruments, soft robots, adaptive mirrors, and exo-suits.

via Phys.org|
#3d-printing#ai#deep-learning