Probing dipole and quadrupole resonance mode in non-plasmonic nanowire using Raman spectroscopy

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dc.contributor.authorRaha, Sreyan
dc.contributor.authorMitra, Sreemanta
dc.contributor.authorKumar Mondal, Prasanna
dc.contributor.authorBiswas, Subhajit
dc.contributor.authorHolmes, Justin D.
dc.contributor.authorSingha, Achintya
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2020-09-04T14:56:12Z
dc.date.available2020-09-04T14:56:12Z
dc.date.issued2020-07-24
dc.date.updated2020-09-02T14:52:17Z
dc.description.abstractElectric field enhancement in semiconductor nanostructures offers a possibility to find an alternative to the metallic particles which is well known for tuning the light-matter interaction due to its strong polarizability and size-dependent surface plasmon resonance energy. Raman spectroscopy is a powerful technique to monitor the electric field as its scattering depends on the electromagnetic eigenmode of the particle. Here, we observe enhanced polarized Raman scattering from germanium nanowires of different diameters. The incident electromagnetic radiation creates a distribution of the internal electric field inside the naowires which can be enhanced by manipulating the nanowire diameter, the incident electric field and its polarization. Our estimation of the enhancement factor, including its dependence on nanowire diameter, agrees well with the Mie theory for an infinite cylinder. Furthermore, depending on diameter of nanowire and wavelength of incident radiation, polarized Raman study shows dipolar (antenna effect) and quadrupolar resonances, which has never been observed in germanium nanowire. We attempt to understand this polarized Raman behavior using COMSOL Multiphysics simulation, which suggests that the pattern observed is due to photon confinement within the nanowires. Thus, the light scattering direction can be toggled by tuning the polarization of incident excitation and diameter of non plasmonic nanowire.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid425201en
dc.identifier.citationRaha, S., Mitra, S., Kumar Mondal, P., Biswas, S., D Holmes, J. and Singha, A. (2020) 'Probing dipole and quadrupole resonance mode in non-plasmonic nanowire using Raman spectroscopy', Nanotechnology, 31(42), 425201 (6 pp). doi: 10.1088/1361-6528/ab9cf9en
dc.identifier.doi10.1088/1361-6528/ab9cf9en
dc.identifier.endpage6en
dc.identifier.issn0957-4484
dc.identifier.issued42en
dc.identifier.journaltitleNanotechnologyen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/10475
dc.identifier.volume31en
dc.language.isoenen
dc.publisherIOP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2513/IE/Silicon Compatible, Direct Band-Gap Nanowire Materials For Beyond-CMOS Devices/en
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1361-6528/ab9cf9
dc.rights© 2020 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6528/ab9cf9 As the Version of Record of this article has been published on a subscription basis, this Accepted Manuscript will be available for reuse under a CC BY-NC-ND 3.0 licence after a 12 month embargo period.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectSingle molecule detectionen
dc.subjectSemiconductor nanowiresen
dc.subjectSiliconen
dc.subjectScatteringen
dc.subjectNanoparticlesen
dc.subjectGermaniumen
dc.subjectPhononen
dc.subjectElectric field enhancementen
dc.subjectPolarized raman scatteringen
dc.subjectDipolar and quadrupolar resonancesen
dc.subjectNon-plasmonic nanowireen
dc.titleProbing dipole and quadrupole resonance mode in non-plasmonic nanowire using Raman spectroscopyen
dc.typeArticle (peer-reviewed)en
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