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Magnetic field concentration with coaxial silicon nanocylinders in the optical spectral range

Kseniia V. Baryshnikova, Andrey Novitsky, Andrey B. Evlyukhin, and Alexander S. Shalin

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Abstract

Resonant magnetic energy accumulation is theoretically investigated in the optical and near-infrared regions. It is demonstrated that the silicon nanocylinders with and without coaxial through holes can be used for the control and manipulation of optical magnetic fields, providing up to 26-fold enhancement of these fields for the considered system. Magnetic field distributions and dependence on the parameters of nanocylinders are revealed at the wavelengths of magnetic dipole and quadrupole resonances responsible for the enhancement. The obtained results can be applied, for example, to designing nanoantennas for the detection of atoms with magnetic optical transitions.

© 2017 Optical Society of America

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