The September 3, 2009 issue of Science Daily harbored a fascinating article called "Super-fast Computers of the Future". Computer information will be transferred in the form of light signals instead of via electrical currents. Queens Universlty Belfast and Imperial College London are the lucky academic entitites that got funded for the research. The challenge lies in the realm of the developing science of nanotechnology, the science of manufacturing parts and devices at the molecular level to function in the world of computer engineering.
"Nanoplasmonic" devices are no bigger than 100 times the width of a human hair and are divided in the categories of "wave guides" to help the light signals navigate their way through the tiny components; and signal receivers and detectors to "catch" the data after their journey through the computers processor has been attained. Currently, nanoscale metal devices in computer processors work with electric current, but the new devices have been designed to interact with light in an unusal and highly controlled way which make it possible to use light signals to compute data.
These processors will become known as "optical computers" based on their utilization of light. The prediction is that they will be much faster and more efficient than what is at our fingertips today.
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