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Angular momentum properties of electromagnetic field transmitted through holey plasmonic vortex lenses.

Authors
  • Zilio, Pierfrancesco
  • Mari, Elettra
  • Parisi, Giuseppe
  • Tamburini, Fabrizio
  • Romanato, Filippo
Type
Published Article
Journal
Optics Letters
Publisher
The Optical Society
Publication Date
Aug 01, 2012
Volume
37
Issue
15
Pages
3234–3236
Identifiers
DOI: 10.1364/OL.37.003234
PMID: 22859143
Source
Medline
License
Unknown

Abstract

We performed three-dimensional finite elements simulations of the optical response of holey plasmonic vortex lenses, i.e., spiral grooves milled on a thin gold film with a hole at the center. We focus in particular on the properties of the wave transmitted in the underlying half-space, which is shown to be a relevant part of the transmitted field. We find out that the angular momentum selection rule for this part of the field is different from the one for the transmitted plasmonic vortex, although closely related to the plasmonic interaction of the impinging wave with the chiral geometry.

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