Harry A. Atwater, Jr. is a Howard Hughes Professor and Professor of Applied Physics and Materials Science at the California Institute of Technology. Since 2014 he is the editor-in-chief of the journal ACS Photonics, published by the American Chemical Society.His research interests center around two interwoven research themes: photovoltaics and solar energy; and plasmonics and optical metamaterials. Atwater and his group have been active in photovoltaics research for more than 20 years.