Researchers create invisibility cloak for the terahertz band

'Shielding' for security and communications
By Nick Flaherty www.flaherty.co.uk

Researchers at Northwestern University in the US have created a new kind of cloaking material that can render objects invisible in the terahertz range. Although the design can't translate into an invisibility cloak for the visible spectrum, it could have implications in diagnostics, security, and communication