Excitation of nonradiating magnetic anapole states with azimuthally polarized vector beams.

ABSTRACT: Nonradiating current configurations have been drawing the attention of the physics community for many years. It has been demonstrated recently that dielectric nanoparticles provide a unique platform to host such nonradiating modes, called "anapoles". Here we study theoretically the excitation of such exotic anapole modes in silicon nanoparticles using structured light. Alternative illumination configurations, properly designed, are able to unlock hidden behavior of scatterers. Particularly, azimuthally polarized focused beams enable us to excite ideal anapole modes of magnetic type in dielectric nanoparticles. Firstly, we perform the decomposition of this type of excitation into its multipolar content and then we employ the T-matrix method to calculate the far-field scattering properties o

SUBMITTER: Lamprianidis AG 

PROVIDER: S-EPMC6009353 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature