Mario Agio is a Senior Researcher at the National Institute of Optics (INO-CNR) and the European Laboratory for Nonlinear Spectroscopy (LENS), Florence, Italy. His research interests focus on single-molecule spectroscopy and optical nanoscopy, quantum- and nonlinear-optics in photonic nanostructures, plasmonics and metamaterials. He has been awarded the Latsis Prize of ETH-Zurich for his significant contributions to the field of theoretical nano-optics.