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 […]
Tag Archives: Metalens
Cameras and telescopes as thin as a sheet of paper?
Nanowerk June 10, 2021 Metalenses promise to make imaging devices more compact. An international team of researchers (Canada, USA – University of Rochester) has addressed the space between the lenses which is crucial for image formation but takes up by far the most room in imaging systems, by introducing the idea of a spaceplate. They experimentally demonstrated that it is compatible with broadband light in the visible spectrum. They manipulated light based on the angle rather than the position of a light ray. Angle is a completely novel domain. They designed and experimentally demonstrated plates that compressed the space. Such […]
Researchers develop flat lens a thousand times thinner than a human hair
Nanowerk August 24, 2020 In a conventional lens an increase in refraction index increases the field of view in proportion to the flatness of the lens. To image with a single element over a wide field of view an international team of researchers (Brazil, UK, China) used photolithography to design a lens consisting of a single nanometric layer of silicon on arrays of nanoposts that interact with light. The resulting metalens mimics a totally flat lens with an infinite refraction index, which could not be obtained with a conventional lens. It has a field of view, which ideally can reach […]