Radiative toroidal dipole and anapole excitations in collectively responding arrays of atoms
arXiv:2005.05918 · doi:10.1103/PhysRevLett.125.063201
Abstract
A toroidal dipole represents an often overlooked electromagnetic excitation distinct from the standard electric and magnetic multipole expansion. We show how a simple arrangement of strongly radiatively coupled atoms can be used to synthesize a toroidal dipole where the toroidal topology is generated by radiative transitions forming an effective poloidal electric current wound around a torus. We extend the protocol for methods to prepare a delocalized collective excitation mode consisting of a synthetic lattice of such toroidal dipoles and a non-radiating, yet oscillating charge-current configuration, dynamic anapole, for which the far-field radiation of a toroidal dipole is identically canceled by an electric dipole.
References in corpus (14)
- Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
- An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays
- Single-Spin Addressing in an Atomic Mott Insulator
- Cooperative resonances in light scattering from two-dimensional atomic arrays
- Dielectric Metamaterials with Toroidal Dipolar Response
- Storing light with subradiant correlations in arrays of atoms
- Dynamical Theory of Artificial Optical Magnetism Produced by Rings of Plasmonic Nanoparticles
- Subradiant Bell states in distant atomic arrays
- Long-range interacting many-body systems with alkaline-earth-metal atoms
- Photonic Band Structure of Two-dimensional Atomic Lattices
- Collective shift in resonant light scattering by a one-dimensional atomic chain
- Theoretical formalism for collective electromagnetic response of discrete metamaterial systems
- Light propagation in systems involving two-dimensional atomic lattices
- Point-dipole approximation for small systems of strongly coupled radiating nanorods
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