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Magnetoplasmonic control of plasmonic vortices
Maccaferri, Nicolò; Gorodetski, Yuri; Toma, Andrea et al.
2017In Applied Physics Letters, 111 (20), p. 201104
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Abstract :
[en] 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. Published by AIP Publishing.
Disciplines :
Physics
Author, co-author :
Maccaferri, Nicolò ;  Istituto Italiano di Tecnologia
Gorodetski, Yuri
Toma, Andrea
Zilio, Pierfrancesco
De Angelis, Francesco
Garoli, Denis
External co-authors :
yes
Language :
English
Title :
Magnetoplasmonic control of plasmonic vortices
Publication date :
2017
Journal title :
Applied Physics Letters
ISSN :
1077-3118
Publisher :
American Institute of Physics, Melville, United States - New York
Volume :
111
Issue :
20
Pages :
201104
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 22 February 2019

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