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Terahertz
systems
Updated February
2, 2010
New For February 2010!
"T-waves" are all over
the news lately, it seems like they can perform all types of sensor
magic. There are various definitions for what frequencies constitute
"terahertz". Although "tera" implies 10^12,
the casual definition of T-waves encompasses 300 GHz to 3 THz. Above
3 THz is considered the far edge of infrared spectrum.
One system application that has
been fielded is for screening passengers at airports by seeing through
clothing.
Recent articles have provided
evidence that exposure to T-waves can "unzip"
DNA molecules. We'll wait for more research on this before we
offer our opinion(s).
It is possible to create an entirely
passive sensor at terahertz frequency. However, passive (radiometric)
sensors take much longer time to construct an image, and we don't
want to wait any longer in security lines, do we?
More to come!
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