Optically induced antiferromagnetic order in dielectric metasurfaces with complex supercells
Abstract
Metasurfaces are 2D planar lattices of nanoparticles that allow the manipulation of incident light properties. Because of that attribute, metasurfaces are promising candidates to replace bulky optical components. Traditionally, metasurfaces are made from a periodic arrangement of identical unit cells. However, more degrees of freedom are accessible if an increasing number of structured unit cells are combined. The present study explores a type of dielectric metasurface with complex supercells composed of Mie-resonant dielectric nanocylinders and nanoscale rings. We numerically and experimentally demonstrate the signature of an optical response that relies on the structures sustaining staggered optically induced magnetic dipole moments. The optical response is associated with an optical antiferromagnetism. The optical antiferromagnetism exploits the presence of pronounced coupling between dissimilar Mie-resonant dielectric nanoparticles. The coupling is manipulated by engineering the geometry and distance between the nanoparticles, which ultimately enhances their effective magnetic response. Our results suggest possible applications in resonant nanophotonics by broadening the modulation capabilities of metasurfaces.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 06, 2023
- Source ID
- 10.1364/josab.478307
Entities
People
- Aso Rahimzadegan
- Carsten Rockstuhl
- Chengjun Zou
- Dennis Arslan
- Duk-Yong Choi
- Isabelle Staude
- Jürgen Sautter
- Sergey Lepeshov
- Stefan Fasold
- Thomas Pertsch
- Wenjia Zhou
- Yuri Kivshar
Organizations
- Alexander von Humboldt Foundation
- Army Research Office
- Australian National University
- Australian Research Council
- Fraunhofer Institute for Applied Optics and Precision Engineering
- Friedrich Schiller University Jena
- German Research Foundation
- Karlsruhe Institute of Technology
- Saint Petersburg State University of Information Technologies, Mechanics and Optics