Metamaterials—materials engineered to have optical, thermal, or other specific properties naturally occurring substances don’t—can block, bend, and otherwise manipulate all sorts of waves: they can, at least in theory, twist light to render objects invisible, contort ultrasound waves to hide things from sonar, and disguise the telltale wake of a submarine. Now, in an arXiv paper, Australian and Korean researchers have suggested another wave-altering use for metamaterials: protecting buildings from earthquakes’ powerful seismic waves.
What’s the News: Scientists have already bent light to make invisibility cloaks and manipulated sound to hide underwater objects from sonar. Now, researchers have come up with a preliminary design for a mesh shield that would let submarines stealthily maneuver through the seas without leaving any wake, they report in a study published online last week.
What’s the News: Metamaterials could improve wireless power transfer, letting us one day charge our devices without the hassle of cords and wires, says a study published last week in Physical Review B. While wireless power transfer already works to for tiny amounts of energy, metamaterials could theoretically be used to safely and efficiently boost the technique to handle more power, such as microwaves and lasers.