Hybrid Ni/SiO2/Au dimer arrays for high-resolution refractive index sensing

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Pourjamal, Sara
dc.contributor.author Kataja, Mikko
dc.contributor.author Maccaferri, Nicolò
dc.contributor.author Vavassori, Paolo
dc.contributor.author Van Dijken, Sebastiaan
dc.date.accessioned 2018-06-18T09:22:07Z
dc.date.available 2018-06-18T09:22:07Z
dc.date.issued 2018-05
dc.identifier.citation Pourjamal , S , Kataja , M , Maccaferri , N , Vavassori , P & Van Dijken , S 2018 , ' Hybrid Ni/SiO 2 /Au dimer arrays for high-resolution refractive index sensing ' Nanophotonics . DOI: 10.1515/nanoph-2018-0013 en
dc.identifier.issn 2192-8606
dc.identifier.issn 2192-8614
dc.identifier.other PURE UUID: f92c5403-61aa-4d03-b551-c2cc4ec19575
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/hybrid-nisio2au-dimer-arrays-for-highresolution-refractive-index-sensing(f92c5403-61aa-4d03-b551-c2cc4ec19575).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85047497269&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/31374134/_Nanophotonics_Hybrid_NiSiO2Au_dimer_arrays_for_high_resolution_refractive_index_sensing.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/31966
dc.description.abstract 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 dimer 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. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Nanophotonics en
dc.rights openAccess en
dc.subject.other Biotechnology en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other Atomic and Molecular Physics, and Optics en
dc.subject.other Electrical and Electronic Engineering en
dc.subject.other 114 Physical sciences en
dc.subject.other 221 Nanotechnology en
dc.title Hybrid Ni/SiO2/Au dimer arrays for high-resolution refractive index sensing en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Nanomagnetism and Spintronics
dc.contributor.department Department of Applied Physics
dc.contributor.department Italian Institute of Technology
dc.contributor.department CIC NanoGUNE
dc.subject.keyword biosensing
dc.subject.keyword magnetic nanoparticle array
dc.subject.keyword magneto-optics
dc.subject.keyword magnetoplasmonics
dc.subject.keyword Biotechnology
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword Atomic and Molecular Physics, and Optics
dc.subject.keyword Electrical and Electronic Engineering
dc.subject.keyword 114 Physical sciences
dc.subject.keyword 221 Nanotechnology
dc.identifier.urn URN:NBN:fi:aalto-201806183384
dc.identifier.doi 10.1515/nanoph-2018-0013
dc.type.version publishedVersion

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