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Article (Scientific journals)
Anisotropic Nanoantenna-Based Magnetoplasmonic Crystals for Highly Enhanced and Tunable Magneto-Optical Activity
Maccaferri, Nicolò; Bergamini, Luca; Pancaldi, Matteo et al.
2016In Nano Letters, 16 (4), p. 2533-2542
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Keywords :
Magneto-optical Kerr effect; lattice surface modes; magnetoplasmonics; plasmonic anisotropy
Abstract :
[en] We present a novel concept of a magnetically tunable plasmonic crystal based on the excitation of Fano lattice surface modes in periodic arrays of magnetic and optically anisotropic nanoantennas. We show how coherent diffractive far-field coupling between elliptical nickel nanoantennas is governed by the two in-plane, orthogonal and spectrally detuned plasmonic responses of the individual building block, one directly induced by the incident radiation and the other induced by the application of an external magnetic field. The consequent excitation of magnetic field-induced Fano lattice surface modes leads to highly tunable and amplified magneto-optical effects as compared to a continuous film or metasurfaces made of disordered noninteracting magnetoplasmonic anisotropic nanoantennas. The concepts presented here can be exploited to design novel magnetoplasmonic sensors based on coupled localized plasmonic resonances, and nanoscale metamaterials for precise control and magnetically driven tunability of light polarization states.
Disciplines :
Physics
Author, co-author :
Maccaferri, Nicolò ;  CIC nanoGUNE
Bergamini, Luca
Pancaldi, Matteo
Schmidt, Mikolaj K.
Kataja, Mikko
Dijken, Sebastiaan Van
Zabala, Nerea
Aizpurua, Javier
Vavassori, Paolo
External co-authors :
yes
Language :
English
Title :
Anisotropic Nanoantenna-Based Magnetoplasmonic Crystals for Highly Enhanced and Tunable Magneto-Optical Activity
Publication date :
2016
Journal title :
Nano Letters
ISSN :
1530-6992
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
16
Issue :
4
Pages :
2533-2542
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 22 February 2019

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