Nonlocal Flat Optics

• DOI: 10.48550/arxiv.2209.02120
• Publication Date: 2022-01-01
• Authors: Kunal Shastri; Francesco Monticone
• Keywords: Electromagnetics; Geometrical optics

In electromagnetics and photonics, "nonlocality" refers to the phenomenon by which response/output of a material or system at certain point in space depends on input field across an extended region space. While nonlocal effects associated wavevector/momentum-dependence have often been neglected seen as nuisance context metasurfaces, emerging flat optics seeks exploit strong effective nonlocality enrich enhance their response. this Review, we summarize latest advances field, focusing its fundamental principles various applications, from optical computing compression. The convergence local may open exciting opportunities quest control light, real momentum space, using ultra-thin platforms.