Color Superlensing Could Break Through Diffraction Barrier

Researcher Sergey Kharinstev and his team at Kazan Federal University recently published a paper in Optics Letters where they detail the design of a new type of metalens capable of imaging beyond the optical diffraction limit. Schematic of the working principle of a disordered TiN/TiO2 Courtesy of Kazan University A metalens described in the article is a thin composite metal-dielectric film placed on a dielectric substrate; the width is several dozen nanometers. “The light has a wave nature, so there is a diffraction limit which confines the resolution of traditional optical microscopy,” said Kharintsev, who believes his team’s discovery might lead to the use of optical technologies in nanoscale integral...