Symmetry-breaking induced magnetic Fano resonances in densely packed arrays of symmetric nanotrimers.

ABSTRACT: Due to unique properties and great design flexibilities, Fano resonances represent one of the most promising optical features mediated by metallic nanostructures, while the excitation of some Fano modes is impossible due to symmetry reasons. The aim of this work is to show that dense lattice arrangements can have a profound impact on the optical properties of nanostructures and, in particular, can enable the excitation of otherwise dark modes. Here, we demonstrate this concept using the example of rectangular arrays of symmetric trimers packed so densely that the coupling between neighbouring unit cells imposes a symmetry break, enabling the excitation of magnetic Fano resonances. We found that in experiments as well as in simulations, electric and magnetic Fano resonances can be simultane

SUBMITTER: Wang N 

PROVIDER: S-EPMC6393417 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature