Journal: Nanophotonics
Article Title: Neural network enabled wide field-of-view imaging with hyperbolic metalenses
doi: 10.1515/nanoph-2025-0354
Figure Lengend Snippet: Fabrication of the hyperbolic metalens and the imaging setup. (a) Schematic of the hexagonal unit cell of the metalens with a lattice constant of a = 350 nm, consisting of cylindrical nanopillars with a height of H = 500 nm and diameters, D , ranging from 140 nm to 264 nm. (b) Optical image of a wafer with an array of metalenses patterned using deep UV immersion photolithography. (c, d) Scanning electron micrographs of the metalens depicting the patterned a-Si nanopillars on a glass substrate. (e) The simulated phase and transmittance of uniform a-Si nanopillar arrays with height of 500 nm and diameters ranging from 140 to 264 nm with a step size of 2 nm. (f) Optical image of the fabricated 5 mm diameter metalens. (g) Optical image of the hyperbolic metalens camera used in imaging, where the (h) metalens (white circle) is mounted directly in front of the CMOS detector (red square).
Article Snippet: The hyperbolic metalens camera comprises only two components ( ): the metalens and a complementary metal oxide semiconductor (CMOS) detector (Thorlabs, Zelux-CS165MU), resulting in an ultra-compact design.
Techniques: Imaging