Destructive interference between electric and toroidal dipole moments in TiO2 cylinders and frustums with coaxial voids

P D Terekhov,A S Shalin,A B Evlyukhin,K V Baryshnikova

doi:10.1088/1742-6596/929/1/012065

Abstract

We demonstrate numerically the possibility of multipole interference in the TiO2 (titanium dioxide) microcylinders and microfrustums in the wavelength range 210-300 μm. Resonantly strong destructive interference between toroidal and electric dipole contributions to the scattered field is achieved by a geometry tuning. The toroidal and electric dipole mode overlapping at the resonant wavelength with almost total suppression of the total electric dipole moment is achieved.

Highlights

Non-radiating current configurations attract attention of physicists and engineers as possible systems for effective cloaking and camouflage [1]
Interference of electric and toroidal dipole moments could be in destructive way with total suppression of far fields and reducing of the overall scattering down to the zero
Toroidal moment has the same contribution to the farfield scattering as electric dipole and interferes with it in destructive manner

Summary

Introduction

Non-radiating current configurations attract attention of physicists and engineers as possible systems for effective cloaking and camouflage [1]. Interference of electric and toroidal dipole moments could be in destructive way with total suppression of far fields and reducing of the overall scattering down to the zero. We obtain far-field scattering cross-section suppression in the wavelength range 210-300 μm.

Results

Conclusion