Terahertz rays — radiation between microwaves and infrared rays on the electromagnetic spectrum — are a promising means of detecting explosives, but they’ve proven hard to generate cost effectively. So far, solid-state lasers — the cheap, miniature type of laser found in CD players — have been unable to produce terahertz rays unless they’re supercooled, which makes them impractical for mass deployment. «more»

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New hope for terahertz

Professor Qing Hu

RLE Millimeter-wave and Terahertz Devices Group