Researchers
from King Abdullah University of Science and Technology in Saudi Arabia have
developed a new material that may not only provide efficient lighting, but also
power wireless internet with data speed of up to 2 Gigabytes per second. The nano-crystalline
material rapidly makes white light out of blue light. Earlier inventions like
visible-light communication makes use of parts of the electromagnetic spectrum
that are unregulated and is more energy-efficient, but the conversion process
is not fast enough to match the speed at which LEDs can be switched on an off. The
researchers created nanocrystal of cesium lead bromide that were eight nanometers
in size. They were able to show uptical processes in the nanocrystals occurs on
a time-scale of seven nanoseconds. This meant they could modulate the optical
emission at a frequency of 491 megahertz.
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