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This image shows the design of a new type of invisibility cloak that is simpler than previous designs and works for all colors of the visible spectrum, making it possible to cloak larger objects than before and possibly leading to practical applications in “transformation optics.” (Purdue University)

(PhysOrg.com) — Researchers have created a new type of invisibility cloak that is simpler than previous designs and works for all colors of the visible spectrum, making it possible to cloak larger objects than before.

Whereas previous cloaking designs have used exotic “metamaterials,” which require complex nanofabrication, the new design is a far simpler device based on a “tapered optical waveguide,” said Vladimir Shalaev, Purdue University’s Robert and Anne Burnett Professor of Electrical and Computer Engineering.

Waveguides represent established technology – including fiber optics - used in communications and other commercial applications.

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This thread is intended as a tool for debating and implementing sustainable practices with particular reference to tourism. Pursuant to our philosophy and business model, we wee the Green Community not just as a vital local asset, but as a magnet for the visitors we will bring here. More »

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