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Jun 30th, 2012
UCB and The City College of New York use light to make computer chips rewritable
A new technique for making rewritable computer chips uses laser light to control the spin of an atom’s nucleus to encode information, bringing ultrafast quantum computing a step closer to reality.
Current electronic devices, which are approaching the upper limits in processing speed, rely on etching a pattern into a semiconductor to create a chip or integrated circuit. These interconnection patterns serve as highways to shuttle information around circuits, but there is a drawback. “Once the chip is printed, it can only be used one way,” said Dr. Jeffrey Reimer, a University of California, Berkeley, professor of chemical and biomolecular engineering. Now, scientists from UCB and The City College of New York have looked to the emerging sciences of spintronics and quantum computing to remedy these problems. They used laser light to pattern the alignment of spin within atoms so that the pattern can be rewritten on the fly. The technique could lead to rewritable spintronic circuits.
To read more : www.photonics.com
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