Metamaterials could make it possible to transmit wireless power while avoiding the complications associated with microwaves or lasers, engineers at Duke University say.
The material would be situated between a power source and a device to be charged, and it would serve as a sort of a bridge so that there appeared to be no space between the transmitter and the recipient.
Metamaterials can be used to create desktop black holes and simulate multiverses; now a physicist is using them to prove time travel can’t happen.
In a new paper, University of Maryland professor and metamaterial theorist Igor Smolyaninov says mapping light distribution in a metamaterial can serve as a model for the flow of time. The model shows that the forward direction of time is unrelenting; you cannot curve back on time and go back to where you started. You just have to build a desktop Big Bang to prove it.
Forget invisibility cloaks. Researchers at Imperial College London have demonstrated – on paper, anyhow – a metamaterial “space-time cloak” that can conceal entire events from view, making a viewer see one thing while something entirely different takes place behind the cloak. Paging DARPA.
To think Marco Polo didn’t even know what he had. Silk and gold, considered luxury items for as long as mankind has enjoyed shiny things, might now lead the way forward in the growing field of metamaterials. Turning flashy into inconspicuous, scientists from Tufts and Boston University have created an invisibility cloak from silk coated with gold.
Man-made metamaterials could theoretically bend light to create invisibility cloaks, or alter electromagnetic waves in ways nature never intended. Now, a researcher at the University of Maryland in College Park thinks they could do much more than that, becoming man-made analogies to various cosmological theories of how the Universe works and helping researchers explain certain aspects of those universes.
We're one step closer to the stuff of sci-fi and boy wizards. Researchers at the California Institute of Technology have engineered a metamaterial with a refined 3-D structure that gives light a negative refraction index upon entering the material. Put another way, it bends light the opposite way one might expect, irrespective of the angle or polarization of incoming light waves. Put yet another way: We're getting closer to that invisibility cloak we've been looking for.
Inspiration comes from the strangest places. A falling apple supposedly inspired Newton’s laws, and now a desktop ornament bearing Newton’s name has inspired a new acoustic weapon that both militaries and hospitals can keep in their arsenals: sub-sinking, tumor killing “sound bullets.”
Hong Kong researchers have combined simple latex with some plastic buttons to create metamaterial panels that can stop sound waves very effectively, according to New Scientist. The reflected sound waves include low-frequency bass sounds that typically manage to sneak through the walls.