Phys.org   July 22, 2022 Spaceplates are novel flat-optic devices that implement the optical response of a free-space volume over a smaller length, effectively “compressing space” for light propagation. Together with flat lenses such as metalenses or diffractive lenses, spaceplates have the potential to enable the miniaturization of any free-space optical system. The metrics of the ultimate limits of spaceplates bandwidth remains as a crucial roadblock for the adoption of this platform. An international team of researchers ( USA – Cornell University, University of Rochester, Canada) has derived the fundamental bounds on the bandwidth of spaceplates as a function of their […]