2nd COLLOQUIUM ON THE PHYSICS AND APPLICATIONS OF METASURFACES

Conventional optical components control light using gradual phase accumulation through propagation in refractive materials. Recently, ultrathin optical interfaces capable of controlling the light properties, including amplitude - phase - polarization and the dispersion of light, have been proposed for mid-infrared and optical wavelengths. These devices, called metasurfaces, rely on the scattering properties of ultrathin subwavelength scale optical resonators patterned at interfaces. The design was influenced by the ability to control scattering of light from wavelength-scale dielectric or metallic nanoparticles in the resonant scattering regime or in the non-resonant one using the geometric phase. Since about ten years, the concept of metasurfaces has gained considerable attention in the optics community, offering new perspectives for the realization of optical components with unexpected optical functionalities. Devices such as holograms, polarimeters, cameras, lasers with arbitrary wavefronts, polarization sensitive imaging, nonlinear and quantum optical components with extended functionalities have been proposed. The purpose of this workshop is to gather the academic community working on metasurfaces, after the first successful edition. The topics of interests are fundamental principles and technological applications of metasurfaces, targeting new phenomena and advanced optical functionality of metasurfaces, with a careful attention on their applications in realistic optical systems. The workshop contains special sessions addressing both scientific and industrial purpose and an educational afternoon session with a young research forum. The workshop consists of conventional presentations, including 5 special sessions involving academics and industrials (Monday, Tuesday, Wednesday, Thursday morning and Friday morning), and one afternoon (Thursday) devoted for graduate students and postdocs to present their own work in a non-intimidating environment, to build collaborative networks with their peers, and prepare them for active participation to the scientific community. Every day, two main research topics will be considered with a morning and an afternoon dedicated session. A tutorial/keynote presentation has been selected to present and introduce the subject.