Sub-wavelength confinement of the orbital angular momentum of light probed by plasmonic nanorods resonances | Zendy

Marta Carli | Zendy; Pierfrancesco Zilio | Zendy; Denis Garoli | Zendy; V. Giorgis | Zendy; Filippo Romanato | Zendy

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Sub-wavelength confinement of the orbital angular momentum of light probed by plasmonic nanorods resonances

Author(s) -

Marta Carli,

Pierfrancesco Zilio,

Denis Garoli,

V. Giorgis,

Filippo Romanato

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.026302

Subject(s) - plasmon , nanorod , optics , near field scanning optical microscope , plasmonic lens , surface plasmon , wavelength , angular momentum , materials science , surface plasmon polariton , nanoscopic scale , optoelectronics , optical vortex , physics , optical microscope , nanotechnology , scanning electron microscope , beam (structure) , quantum mechanics

We discuss how the topological charge of an OAM-carrying plasmon (Plasmonic Vortex) can be probed by monitoring the near-field response of plasmonic nanostructures suitably arranged inside a Plasmonic Vortex Lens. The turning "on" or "off" of four gold nanorods, detected by a Scanning Near field Optical Microscope (SNOM), acts as a fingerprint of the OAM state of the PV at the nanoscale. Different configurations are studied numerically, the integrated structure is fabricated and near field characterization is performed for a particularly meaningful case.

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