Objects behind barriers

Researchers have created a strong electromagnetic wave that can help authorities see objects behind barriers. In a new research at the University of Rochester, New York, researchers Kang Liu, a Ph.D. student in optics, Xi-Cheng Zhang, the Director of the Institute of Optics, and a group from Greece led by Tzortzakis Stelios worked with this electromagnetic wave –called terahertz. “Use of an unconventional laser beam in our project goes beyond a scientific curiosity. It makes possible the remote sensing of chemical, biological and explosive materials from a standoff distance,” Zhang was quoted as saying.

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