optics: Flat Lenses to Structured Light and Dark
Transcript of optics: Flat Lenses to Structured Light and Dark
Meta‐optics: From Flat Lenses to Structured Light and Dark
FEDERICO CAPASSO
John A. Paulson School of Engineering and Applied Sciences Harvard University, Cambridge, MA 02138 Subwavelength spaced arrays of nanostructures, known as metasurfaces, provide a new basis
for recasting optical components into thin planar elements, easy to optically align and control
aberrations, leading to a major reduction in system complexity and footprint as well as the
introduction of new optical functions. The planarity of flat optics will lead to the unification
of semiconductor manufacturing and lens making, where the planar technology to
manufacture computer chips will be adapted to make CMOS compatible metasurface based
optical components for high volume markets like cell phones. Polarization sensitive and depth
cameras will be discussed. Metasurfaces also offer fresh opportunities for structuring light as
well as dark. I will discuss devices that enable light’s spin and OAM to evolve from one state
to another along the propagation direction and multifunctional metasurfaces. Finally, the
demonstration of 2D phase and polarization singularities and the unique applications that
they will lead to will be discussed.
Friday 26th November 2021, from 10:30
Room Beltrami ‐ Building 5
Piazza Leonardo da Vinci, 32 Milano