Toroidal mode trapping in a magnetic meta-molecule

authored by

Tong Wu, Andrey B. Evlyukhin, Vladimir R. Tuz

Abstract

In this paper, we establish the relationship between the eigenmodes and the scattering characteristics of a meta-molecule made of magnetic disks from the point of view of the manifestation of its toroidal response. In particular, we examine the electric and magnetic dipole contributions to the scattering cross-sections obtained in the framework of the multipole decomposition method while accounting for the polarizability and magnetization induced in the structure by the field of incoming radiation. We find out that with increasing permeability, the toroidal mode is trapped in the meta-molecule due to the presence of its magnetization part, which may have a practical perspective in gyrotropy, permittivity, and permeability sensing.

Organisation(s)

PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Institute of Quantum Optics

External Organisation(s)

International Center of Future Science (ICFS)
Kharkov National University

Type

Article

Journal

Journal of Physics D: Applied Physics

Volume

57

No. of pages

6

ISSN

0022-3727

Publication date

25.09.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Acoustics and Ultrasonics, Surfaces, Coatings and Films

Electronic version(s)

https://doi.org/10.1088/1361-6463/ad7bc6 (Access: Closed)