Scientists have developed a kind of laser that uses particles made up of matter and light, and uses less power than conventional semiconductor lasers. The new laser -- developed by Sven Höfling, a physicist at the University of Würzburg in Germany -- doesn't need conventional lasers to generate polaritons. "It is a new source of light that can be generated directly with conventional batteries. By demonstrating electrical pumping, our international research team has moved this sort of laser towards practical applications." he said.

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