Local versus bulk circular dichroism enhancement by achiral all-dielectric nanoresonators.

ABSTRACT: Large optical chirality in the vicinity of achiral high-index dielectric nanostructures has been recently demonstrated as useful means of enhancing molecular circular dichroism. We theoretically study the spatial dependence of optical chirality enhancement in the vicinity of high-index dielectric nanodisks and highlight its importance for the design of nanophotonic platforms for circular dichroism enhancement. Using a T-matrix framework, we demonstrate that, depending on the disk aspect ratio, chirality is enhanced preferentially along different directions. We employ various statistical procedures, including surface, volume and orientation averaging, to predict enhancement of chiroptical effects and show that optimal properties of a nanostructure depend substantially on whether spatial max

SUBMITTER: Czajkowski KM 

PROVIDER: S-EPMC11501269 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature