# Scatterers of Non-Electric-Dipole Radiation

## TL;DR

This paper shows how silicon nanodisk dimers can suppress electric dipole scattering using an anapole mode, enabling tunable magnetic resonance in the visible spectrum.

## Contribution

The novelty lies in achieving electric dipole mode-free scattering through anapole mode interference in nonmagnetic nanostructures.

## Key findings

- Nonmagnetic silicon nanodisk dimers can suppress electric dipole responses at magnetic resonance frequencies.
- Anapole mode enables destructive interference between electric and toroidal dipole moments.
- Magnetic resonance is tunable in the visible spectrum and compatible with nanofabrication.

## Abstract

We theoretically demonstrate that nonmagnetic silicon nanodisk dimers, under plane-wave illumination, can achieve electric dipole mode-free by suppressing electric dipole responses at magnetic resonance frequencies through structural parameter tuning. This is enabled by the anapole mode, where destructive interference between Cartesian electric and toroidal dipole moments results in low spherical electric dipole scattering. Furthermore, the magnetic resonance responses in this nanostructure are tunable within the visible spectrum and compatible with current nanofabrication technology.