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Terahertz, IR Beams Detect Trace Gases at a Distance

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DURHAM, N.C., Dec. 17, 2014 — A combination of IR and terahertz radiation (T-rays) is giving scientists a nose-up on toxic gases. This technology is able to sniff out even trace amounts of harmful gases — from chemical spill effects to nerve gas attacks — in the air from up to 1 km away. Researchers at Duke University and the U.S. Army Aviation and Missile Research, Development and Engineering Center (AMRDEC), had a hand in developing the technology, which can differentiate between various types of gases and chemicals under normal atmospheric pressure. It could make possible things like testing for...Read full article

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    Published: December 2014
    Glossary
    terahertz
    Terahertz (THz) refers to a unit of frequency in the electromagnetic spectrum, denoting waves with frequencies between 0.1 and 10 terahertz. One terahertz is equivalent to one trillion hertz, or cycles per second. The terahertz frequency range falls between the microwave and infrared regions of the electromagnetic spectrum. Key points about terahertz include: Frequency range: The terahertz range spans from approximately 0.1 terahertz (100 gigahertz) to 10 terahertz. This corresponds to...
    Research & TechnologyLaserschemicalsAmericasIRterahertzT-raysSensors & DetectorsDuke UniversityU.S. ArmyAMRDECHenry Everittgas sensordouble resonance spectroscopy

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