Abstract

Dielectric nanostructures with a high refractive index and a low optical loss have recently attracted considerable attention as an alternative to plasmonic nanostructures [1-5]. They are known to possess both electric dipole (ED) and also magnetic dipole (MD) resonances in the visible region while only the ED is dominantly excited for plasmonic nanostrucutures in the visible. The electromagnetic multipoles excited in the high-index dielectric nanostructures enable the manipulation of light beyond the diffraction limit and offer high electromagnetic field enhancement comparable to that exhibited by the plasmonic nanostructures.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)