Magnetoplasmonic control of plasmonic vortices

Nicolò Maccaferri, Yuri Gorodetski, Andrea Toma, Pierfrancesco Zilio, Francesco De Angelis, Denis Garoli

Research output: Contribution to journalArticlepeer-review


We theoretically investigate the generation of far-field propagating optical beams with a desired orbital angular momentum by using an archetypical magnetoplasmonic tip surrounded by a gold spiral slit. The use of a magnetic material can lead to important implications once magneto-optical activity is activated through the application of an external magnetic field. The physical model and the numerical study presented here introduce the concept of magnetically tunable plasmonic vortex lens, namely a magnetoplasmonic vortex lens, which ensures a tunable selectivity in the polarization state of the generated nanostructured beam. The presented system provides a promising platform for a localized excitation of plasmonic vortices followed by their beaming in the far-field with an active modulation of both light's transmission and helicity.

Original languageEnglish
Article number201104
JournalApplied Physics Letters
Issue number20
StatePublished - 13 Nov 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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