A "metamaterial" that filters terahertz radiation could open up new spectrums for wireless communication.
According to New Scientist, The new apparatus, developed
by researchers at the University of Utah have worked out a way of using terahertz
waves for communications.
The device is a sheet of metal foil using a carefully designed pattern of holes that interacts with electromagnetic waves in novel ways, thanks to
sub-wavelength structural features.
The filter is a first step towards developing a terahertz
communications system. If the system is developed it will only work over
relatively short distances, like a computer network, as the waves are absorbed
by moisture in the atmosphere over longer distances.
They believe that it will be five years before any complete
system can be developed.