Archive for metamaterials

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Shaping Sound With Metamaterials

Metamaterials have the ability to create an effect based on their structure. Most metamaterials in recent news have involved optical or electrical effects. Researchers at the Universities of Sussex and Bristol have invented metamaterials that bend, shape, and focus sound. This has potential applications in medical imaging, sonar, haptics, and personal audio. Metamaterial bricks and […]

Smart Nano-colloidal Metamaterials

Metamaterials have been getting recent press for their potential to create invisibility cloaks. Colloids are particle suspensions that have always been part of our lives (blood, milk, fog…) and operate at the nano level. Smart materials offer the ability to change their characteristics under control. Incorporating metamaterials into colloids will allow them to be deployed […]

Smart Camouflage from Squid

Studying active camouflage techniques seen in squid, allows University of Bristol researchers to model an artificial skin that can do the same thing. They hope this will lead to dynamic illumination in clothing and even cloaking. Squid inspires camouflaging smart materials – [bristol.ac.uk] Researchers from the University of Bristol have shown it is possible to […]

1854 – Maxwell’s Fish-Eye Lens

In 1854, James Clerk Maxwell conceived of a perfect spherical lens while pondering the eye of a kipper (fish) that was served for breakfast. When light moves from one medium (like air) to another (like glass or water) it is bent as its speed changes. The degree to which it is bent is called the […]

Fractal Antenna

Conventional antennas were typically based on some fraction of the wavelength that they were designed to receive. This meant the size of the antenna often varied with the frequency range they used. Fractal antennas reduce the overall size of the antenna because the length of the receiving contact is distributed over a fractal pattern that […]

Plasmonics

In electronics, electrical signals are pushed along wires, or small conductive traces that act like wires. The speed of these signals depend upon the ability of the conductor material to relay electromagnetic waves. While this speed is quite fast, it is often slow compared to the speed of light. For example: in a vacuum an […]

Acoustic Hyperlens

High resolution ultrasound scans and greatly improved sonal imaging may become possible because of a technique using metamaterials to create a hyperlens that can focus sound to a fraction of its wavelength. Acoustic Hyperlens Could Sharpen Ultrasound Imaging – [ieee.org] In the past few years, researchers have created artificial materials known as metamaterials, which bend […]