federico capasso





Harvard University, USA



Flat Optics: From Structuring Light and Dark to Metalenses for High Volume Applications


Metasurfaces enable the shaping of wavefronts in arbitrary ways, by dispersion engineering of the meta-atoms. Here I will review my group research on singularity engineering, including arrays of equally spaced 0D singularities, 2D singular sheets of arbitrary shapes and topologically protected singularities in the 4D space encompassing real space and wavelength. In the latter when a perturbation is added to the metasurface the singularity in the focal spot is preserved but shifts in wavelength, signaling topological protection. I will present active metasurfaces for high-speed optical modulation at telecom wavelengths based on electrooptic polymers and Si and give the state-of-the-art of commercial metalenses including their high-volume manufacturing for consumer electronics. Finally, I will discuss our recent work on metalenses for the EUV ( 50 nm wavelength) based on vacuum guiding.





Federico CAPASSO holds a Doctor of Physics degree from the University of Roma, La Sapienza. He is the Robert Wallace Professor of Applied Physics at Harvard University, which he joined in 2003 after 27 years at Bell Labs where his career advanced from postdoctoral fellow to Vice President for Physical Research. He has made wider ranging contributions to optics and photonics, nanoscience, designer materials leading to his invention of the quantum cascade laser carried out fundamental studies of the Casimir effect, including the first measurement of the repulsive Casimir force. He pioneered metasurfaces, discovering their generalized laws of refraction and reflection, and metaoptics, such as high performance metalenses. He is a co-founder and board member of Metalenz Inc. (https://www.metalenz.com/), which is focused on commercializing metaoptics for high-volume markets. He is Clarivate citation laureate for physics in 2023 which recognizes an exceptional citation record within the Web of Science™. He is a member of the National Academy of Sciences, the National Academy of Engineering, the Academia Europaea, the Accademia dei Lincei, a fellow of the National Academy of Inventors, and a fellow of the American Academy of Arts and Sciences (AAAS). His awards include the Balzan Prize in Applied Photonics, the King Faisal Prize, the AAAS Rumford Prize, the IEEE Edison Medal, the IEEE Sarnoff Award, the American Physical Society Arthur Schawlow Prize, the Yves Medal of Optica, the Enrico Fermi Prize of the Italian Physical Society, the Matteucci Medal, the Wetherill Medal of the Franklin Institute, the Materials Research Society Medal and the Jan Czochralski Award for lifetime achievements in Materials Science. He holds honorary doctorates from Lund University, Diderot University, the University of Bologna and University of Roma, Tor Vergata.