Parity-Time Symmetric Nonlocal Metasurfaces: All-Angle Negative Refraction and Volumetric Imaging - Monticone, Francesco; Valagiannopoulos, Constantinos A.; Alù, Andrea (Physical review. X, 2016)
Keywords: Aberration; Imaging; Invariants; Lens design; Lenses; Metamaterials; Metasurfaces; Optics; Parity; Refraction; Symmetry