Black Titanium created by a blast from femtosecond laser (Photo: Richard Baker, University of Rochester)
Guo in his lab at the Institute of Optics at the University of Rochester (Photo: Richard Baker, University of Rochester)
Scientist Chunlei Guo discovered a way to change the surface of a variety of metals so they absorbed virtually all light by using intense laser light in late 2006. He followed up his “black metal” discovery in 2008 by discovering how to use the same basic process to alter surface properties to turn metals a variety of colors. Now Guo and his University of Rochester colleagues have discovered that the altered black metals can detect electromagnetic radiation with frequencies in the terahertz range, also known as T-rays, which have potential in medical and scientific scanning applications, as well as security scanners.
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