Metalenses — flat surfaces that use nanostructures to focus light — promise to revolutionize optics by replacing the bulky, curved lenses currently used in optical devices with a simple, flat surface. But, these metalenses have remained limited in the spectrum of light they can focus well. Now a team of researchers has developed the first single lens that can focus the entire visible spectrum of light — including white light — in the same spot and in high resolution.

Via:: http://feeds.sciencedaily.com/~r/sciencedaily/matter_energy/nanotechnology/~3/QYFPxB6OhaA/180101144747.htm

Single metalens focuses all colors of the rainbow in one point

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