Flat Lenses without Chromatic Aberration

Capasso 2015 image
Image: Federico Capasso, Harvard University

Ordinary refractive lenses suffer from significant chromatic aberrations as different wavelengths are focused in different spots. New lenses based on metasurface are designed to focus light in the same spot for 3 different wavelengths with no need to increase the lens thickness and footprint.

Related Abstract

Gray arrow  http://meeting.aps.org/Meeting/MAR15/Session/F6.1