,
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Unfortunately,
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, previous polariton lasers required researchers to shine light on the semiconductor to inject energy and create the electron-hole pairs. A laser that requires another laser to function is pretty useless,
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, says physicist Sven Höfling at the University of Würzburg in Germany. So he and his team developed a polariton laser that runs on electricity.

Their device,
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, detailed in the May 16 Nature,
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, has titanium and gold electrodes that send current through the semiconductor and spark the formation of polaritons that emit a beam of infrared light.

The next step toward a practical device is to raise the operating temperature of Höfling’s laser from near absolute zero to around room temperature. That challenge is actually minor,
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, Kavokin says, compared with getting a polariton laser to run on electricity. Kavokin expects the demonstration of an electrical polariton laser functioning at room temperature within a year or two,
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, with commercial applications soon after.
Wed, 15 May 2013 19:47:35 +0000 https://www.sciencenew...oms-core-gets-pear-shaped


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