As reported by telegraph.co.uk Scientists have created the world's smallest laser after they squeezed light into a space smaller than a protein molecule. The breakthrough heralds a revolution in optical technology, paving the way to ''nanolasers'' that can probe and manipulate DNA, and super-fast computers and telecommunications. ''This work shatters traditional notions of laser limits, and makes a major advance toward applications in the biomedical, communications and computing fields,'' said Professor Xiang Zhang, who led the US team. The new ''plasmon'' laser compresses light into a gap five nanometres wide, the size of a single protein molecule. A key step forward was the ability to confine light in such a small space long enough for it to stabilise into a ''coherent'' laser state, with all its waves in step. Plasmons are the wave-like motions of excited electrons on the surfaces of metals. Binding light to these o...
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