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Many of the communication tools of today rely on the function of light or, more specifically, on applying information to a light wave. Up until now, studies on electronic and optical devices with materials that are the foundations of modern electronics—such as radio, TV, and computers—have generally relied on nonlinear optical effects, producing devices whose bandwidth has been limited to the gigahertz (GHz) frequency region. Thanks to research performed at the University of Pittsburgh, a physical basis for terahertz bandwidth (THz)—the portion of the electromagnetic spectrum between infrared and microwave light—has now been demonstrated.
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