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Anapole Meta-Atoms: Nonradiating Electric and Magnetic Sources

Esmaeel Zanganeh1, Andrey Evlyukhin2,3,*, Andrey Miroshnichenko4,†, Mingzhao Song5,1, Elizaveta Nenasheva6, and Polina Kapitanova1,‡

  • 1School of Physics and Engineering, ITMO University, Saint Petersburg 197101, Russia
  • 2Institute of Quantum Optics, Leibniz University Hannover, Welfengarten 1, 30167 Hannover, Germany
  • 3Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
  • 4School of Engineering and Information Technology, University of New South Wales Canberra, Australian Capital Territory 2600, Australia
  • 5College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
  • 6Ceramics Company Limited, 10, Kurchatova Street, Saint Petersburg 194223, Russia

  • *a.b.evlyukhin@daad-alumni.de
  • †andrey.miroshnichenko@unsw.edu.au
  • ‡p.kapitanova@metalab.ifmo.ru
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Phys. Rev. Lett. 127, 096804 – Published 27 August, 2021

DOI: https://doi.org/10.1103/PhysRevLett.127.096804

Abstract

The existence of classical nonradiating electromagnetic sources is one of the puzzling questions to date. Here, we investigate radiation properties of physical systems composed of a single ultrahigh permittivity dielectric hollow disk excited by electric or magnetic pointlike dipole antennas, placed inside the inner bore. Using analytical and numerical methods, we demonstrate that such systems can support anapole states with total suppression of far-field radiation and thereby exhibit the properties of electric or magnetic nonradiating sources. It is shown that the suppression of the far-field radiated power is a result of the destructive interference between radiative contributions of the pointlike dipole antennas and the corresponding induced dipole moments of the hollow disk. The experimental investigation of the nonradiating electric source has been performed to confirm our theoretical predictions. Our results pave the way to create and realize compact nonradiative sources for applications in modern wireless power transfer systems, sensors, RFID tags, and medical technologies.

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Phys. Rev. Lett. 127, 096804– Published 27 August, 2021
  • Received 24 February 2021
  • Accepted 20 July 2021
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