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Terahertz lasers

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  • New hope for terahertz

    A laser that generates terahertz rays — which can detect explosives — operates at higher temperatures than some thought possible.

    December 16, 2010
  • Fine-tuned laser

    A wholly new approach to tuning a laser’s frequency brings us a step closer to airport scanners that can distinguish aspirin from explosives.

    December 4, 2009