Resonances in finite-size all-dielectric metasurfaces for light trapping and propagation control

authored by: Nikita Ustimenko, Carsten Rockstuhl, Andrey B. Evlyukhin
Abstract: We investigate the development and tuning of resonant optical effects in finite-size periodic arrays (metasurfaces) of silicon nanoparticles. By applying Green's tensor formalism and the coupled dipole approximation while incorporating electric and magnetic dipole moments, we outline a theoretical framework to model the optical response of such nanoparticle arrays. We consider the resonant optical response of finite-size arrays as a function of the nanoparticle (unit cell) number in two distinct scenarios of collective resonances: the lattice resonant Kerker effect, which is a complete suppression of the backward scattering, and the quasi-bound state in the continuum. Our developed models and findings provide a pathway for extracting crucial details about the lattice period and the required array size for the experimental observation of collective resonances. These resonances are typically predicted under the assumption of an infinite periodic lattice. By bridging the theoretical predictions with practical considerations, our results contribute to better understanding of specific conditions needed to experimentally observe these collective resonances in finite-size arrays.
Organisation(s): Institute of Quantum Optics
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
External Organisation(s): Karlsruhe Institute of Technology (KIT)
Type: Article
Journal: Physical Review B
Volume: 109
No. of pages: 14
ISSN: 2469-9950
Publication date: 28.03.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s): https://doi.org/10.1103/PhysRevB.109.115436 (Access: Closed)