Columbia Engineering researchers have created the first flat lens capable of correctly focusing a large range of colors of any polarization to the same focal spot without the need for any additional elements. Only a micron thick, their revolutionary "flat" lens is much thinner than a sheet of paper and offers performance comparable to top-of-the-line compound lens systems. The findings of the team, led by Nanfang Yu, associate professor of applied physics, are outlined in a new study, published by Light: Science & Applications.

Siu-Wai Chan, Professor of Materials Science and Engineering, was elected a 2018 APS Fellow "for observing and understanding the grain boundary dislocation motion in materials, providing a seminal impact on superconducting thin film boundary devices, and inventing a novel ecological synthesis technique of nano-crystals oxides for catalysis applications."