Active magneto-optical metalens
Year: 2025
Authors: Habibighahfarokhi F., Sergaeva O., De Angelis C., Rocco D.
Autors Affiliation: Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; CNR, Natl Inst Opt, Via Branze 45, I-25123 Brescia, Italy.
Abstract: We demonstrate a metasurface made of bismuth-substituted yttrium iron garnet (BIG) nanodisks that, in the presence of a magnetic field, functions as a polarization-sensitive metalens. Specifically, switching the handedness of the incident circularly polarized light (from right-to left-handed or vice versa) results in distinct focusing behavior. We provide a full-wave simulation study of the metalens performance, considering the response of the BIG nanodisks, the resultant phase profile in comparison with the target one, and the platform focusing efficiency. Our findings establish a foundational framework for developing active metadevices whose optical response can be modulated by an external magnetic field. (c) 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Journal/Review: OPTICS EXPRESS
Volume: 33 (16) Pages from: 34745 to: 34755
More Information: Ministero dell’Universita e della Ricerca (D53D23001250001, D53D23016160001, E63C22002040007).KeyWords: MetasurfacesDOI: 10.1364/OE.568658
