Designing Multipolar Resonances in Dielectric Metamaterials.

ABSTRACT: Dielectric resonators form the building blocks of nano-scale optical antennas and metamaterials. Due to their multipolar resonant response and low intrinsic losses they offer design flexibility and high-efficiency performance. These resonators are typically described in terms of a spherical harmonic decomposition with Mie theory. In experimental realizations however, a departure from spherical symmetry and the use of high-index substrates leads to new features appearing in the multipolar response. To clarify this behavior, we present a systematic experimental and numerical characterization of Silicon disk resonators. We demonstrate that for disk resonators on low-index quartz substrates, the electric and magnetic dipole modes are easily identifiable across a wide range of aspect-ratios, bu

SUBMITTER: Butakov NA 

PROVIDER: S-EPMC5144073 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature