Article (Scientific journals)
Directional Plasmonic Excitation by Helical Nanotips
Singh, Leeju; Maccaferri, Nicolò; Garoli, Denis et al.
2021In Nanomaterials, 11 (5), p. 1333
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Keywords :
Plasmonics; Nanotip; Chiral; Symmetry breaking; Directional excitation
Abstract :
[en] The phenomenon of coupling between light and surface plasmon polaritons requires specific momentum matching conditions. In the case of a single scattering object on a metallic surface, such as a nanoparticle or a nanohole, the coupling between a broadband effect, i.e., scattering, and a discrete one, such as surface plasmon excitation, leads to Fano-like resonance lineshapes. The necessary phase matching requirements can be used to engineer the light–plasmon coupling and to achieve a directional plasmonic excitation. Here, we investigate this effect by using a chiral nanotip to excite surface plasmons with a strong spin-dependent azimuthal variation. This effect can be described by a Fano-like interference with a complex coupling factor that can be modified thanks to a symmetry breaking of the nanostructure.
Disciplines :
Physics
Author, co-author :
Singh, Leeju
Maccaferri, Nicolò ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Garoli, Denis
Gorodetski, Yuri
External co-authors :
yes
Language :
English
Title :
Directional Plasmonic Excitation by Helical Nanotips
Publication date :
2021
Journal title :
Nanomaterials
ISSN :
2079-4991
Publisher :
MDPI AG, Basel, Switzerland
Volume :
11
Issue :
5
Pages :
1333
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
FnR Project :
FNR13624497 - Ultrafast Coherent Hybridization Of Photons And Spins In Multi-functional Magnetoplasmonic Metamaterials, 2019 (01/01/2020-31/12/2022) - Daniele Brida
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