Borges, Ben-Hur V.
Krauss, Thomas F.
Martins, Emiliano R.
Total Authors: 8
 Univ Sao Paulo, Dept Elect & Comp Engn, Sao Carlos Sch Engn, BR-13566590 Sao Paulo - Brazil
 Univ York, Dept Phys, York YO10 5DD, N Yorkshire - England
 Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Sch Phys, Guangzhou 510275, Guangdong - Peoples R China
Total Affiliations: 3
AUG 19 2020.
Web of Science Citations:
Metalenses are nanostructured surfaces that mimic the functionality of optical elements. Many exciting demonstrations have already been made, for example, focusing into diffraction-limited spots or achromatic operation over a wide wavelength range. The key functionality that is yet missing, however, and that is most important for applications such as smartphones or virtual reality, is the ability to perform the imaging function with a single element over a wide field of view. Here, by relaxing the constraint on diffraction-limited resolution, we demonstrate the ability of single-layer metalenses to perform wide field of view (WFOV) imaging while maintaining high resolution suitable for most applications. We also discuss the WFOV physical properties and, in particular, we show that such a WFOV metalens mimics a spherical lens in the limit of infinite radius and infinite refractive index. Finally, we use Fourier analysis to explain the dependence of the FOV on the numerical aperture. (AU)