A metasurface made of arsenic trisulphide nanowires (yellow) transmits an incoming near-infrared frequency (red) as well as its third harmonic ultraviolet frequency (violet), which would normally be absorbed by the material. (Courtesy: Duke University)
A new, nanostructured version of a material known as a chalcogenide glass could find its way into a
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Isabelle Dumé
is a contributing editor to Physics World