Article (Scientific journals)
Hybrid Ni/SiO2/Au dimer arrays for high-resolution refractive index sensing
Pourjamal, Sara; Kataja, Mikko; Maccaferri, Nicolò et al.
2018In Nanophotonics, 7 (5), p. 905-912
Peer Reviewed verified by ORBi
 

Files


Full Text
[Nanophotonics] Hybrid NiSiO2Au dimer arrays for high-resolution refractive index sensing.pdf
Publisher postprint (525.29 kB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Abstract :
[en] We introduce a novel magnetoplasmonic sensor concept for sensitive detection of refractive index changes. The sensor consists of a periodic array of Ni/SiO2/Au direr nanodisks. Combined effects of near-field interactions between the Ni and Au disks within the individual dimers and far-field diffractive coupling between the dimers of the array produce narrow linewidth features in the magneto-optical Faraday spectrum. We associate these features with the excitation of surface lattice resonances and show that they exhibit a spectral shift when the refractive index of the surrounding environment is varied. Because the resonances are sharp, refractive index changes are accurately detected by tracking the wavelength where the Faraday signal crosses 0. Compared to random distributions of pure Ni nanodisks or Ni/SiO2/Au dimers or periodic arrays of Ni nanodisks, the sensing figure of merit of the hybrid magnetoplasmonic array is more than one order of magnitude larger.
Disciplines :
Physics
Author, co-author :
Pourjamal, Sara
Kataja, Mikko
Maccaferri, Nicolò ;  Istituto Italiano di Tecnologia
Vavassori, Paolo
van Dijken, Sebastiaan
External co-authors :
yes
Language :
English
Title :
Hybrid Ni/SiO2/Au dimer arrays for high-resolution refractive index sensing
Publication date :
2018
Journal title :
Nanophotonics
ISSN :
2192-8606
eISSN :
2192-8614
Publisher :
De Gruyter, Germany
Volume :
7
Issue :
5
Pages :
905-912
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 22 February 2019

Statistics


Number of views
56 (2 by Unilu)
Number of downloads
74 (0 by Unilu)

Scopus citations®
 
50
Scopus citations®
without self-citations
38
OpenCitations
 
35
WoS citations
 
48

Bibliography


Similar publications



Contact ORBilu