Sub-wavelength visualization of near-field scattering mode of plasmonic nano-cavity in the far-field.

ABSTRACT: Spatial visualization of mode distribution of light scattering from plasmonic nanostructures is of vital importance for understanding the scattering mechanism and applications based on these plasmonic nanostructures. A long unanswered question in how the spatial information of scattered light from a single plasmonic nanostructure can be recovered in the far-field, under the constraints of the diffraction limit of the detection or imaging optical system. In this paper, we reported a theoretical model on retrieving local spatial information of scattered light by plasmonic nanostructures in a far-field optical imaging system. In the far-field parametric sin δ images, singularity points corresponding to near-field hot spots of the edge mode and the gap mode were resolved for gold ring a

SUBMITTER: Jin X 

PROVIDER: S-EPMC11501192 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature