As “lower-frequency” applications, such as wireless communications, continue to consume bandwidth, researchers of imaging systems look beyond even the millimeter-wave range for available spectrum. For many applications, including materials research, medical diagnostics, and homeland-security systems, terahertz (THz) technology offers great promise. Located in that mysterious part of the electromagnetic (EM) spectrum where millimeter-wave EM energy makes the transition to infrared (IR) optical energy, THz imaging can provide greater focus and control than x-ray radiation...
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