Ontology highlight
ABSTRACT:
SUBMITTER: Triolo C
PROVIDER: S-EPMC6441006 | biostudies-literature | 2019 Mar
REPOSITORIES: biostudies-literature
Triolo Claudia C Savasta Salvatore S Settineri Alessio A Trusso Sebastiano S Saija Rosalba R Agarwal Nisha Rani NR Patanè Salvatore S
Scientific reports 20190329 1
We present scanning near-field images of surface plasmon modes around a single elliptical nanohole in 88 nm thick Au film. We find that rotating surface plasmon vortex modes carrying extrinsic orbital angular momentum can be induced under linearly polarized illumination. The vortex modes are obtained only when the incident polarization direction differs from one of the ellipse axes. Such a direct observation of the vortex modes is possible thanks to the ability of the SNOM technique to obtain in ...[more]