This computer visualization shows the distribution of magnetic energy between two magnets held in separate metamaterial shells. (Courtesy: Alvar Sanchez and colleagues)

Magnetic metamaterials could boost wireless energy transmission

Dec 12, 2012

Physicists in Spain have calculated that substantial amounts of energy could be transmitted through air by using special materials to shape the magnetic fields around conductors. Although the concept has yet to be verified in the lab, the researchers say that it could lead to a viable method of transmitting electrical power, as well as applications in magnetic sensors and studies of the brain.

The idea of transmitting significant quantities of electrical energy without using wires has a long history. In 1891 Nikola Tesla showed that electricity could be sent through the air using induction coils. He continued to work on the idea alongside his work on wired transmission, but energy losses prevented its large-scale implementation.

Read more: Magnetic metamaterials could boost wireless energy transmission – physics world.

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