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dc.contributor.authorAvsar, D.
dc.contributor.authorErturk, H.
dc.contributor.authorMengüç, Mustafa Pınar
dc.date.accessioned2021-02-11T11:32:38Z
dc.date.available2021-02-11T11:32:38Z
dc.date.issued2020-01
dc.identifier.issn0022-4073en_US
dc.identifier.urihttp://hdl.handle.net/10679/7296
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S0022407319304509
dc.description.abstractAbsorption efficiency profiles and localized surface plasmon resonance (LSPR) wavelengths are reported for metallic core-shell nanoparticles (NPs) placed over a BK7 glass substrate. A numerical study is performed with the vectorized version of the discrete dipole approximation with surface interactions (DDA-Sl-v). Gold (Au) and silver (Ag) metallic components are used for the simulations of two different core-shell structures. Absorption enhancement and the hybrid modes of plasmon resonances of the core-shell structures are compared by using a measure that defines a size configuration. It is observed that a small volume fraction of the core sizes results in shell domination over the plasmon response. An additional study is conducted to discern the sensitivity of the refractive index of nanoparticles in different surrounding environments. With a selected core-shell size configuration of Ag-Au pairs, a significant absorption enhancement with a redshift of LSPR wavelength is observed for both Ag core-Au shell and Au core-Ag shell NPs. The absorption behavior of the bare metallic NPs and selected core-shell pairs in proximity to an external probe's tip is also analyzed. The gallium phosphide (GaP) and silicon (Si) tip usage are investigated with transverse electric (TE) and transverse magnetic (TM) wave polarizations. It is observed that the dominance of light polarization on the absorption enhancement of the NPs switches at different wavelengths, where the dielectric transition for tip materials occurs. These findings show the possible targeted uses of metallic core-shell nanoparticles in several areas such as nanomanufacturing, localized heating, bio-sensing, and material detection applications.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Quantitative Spectroscopy and Radiative Transfer
dc.rightsrestrictedAccess
dc.titleAbsorption and plasmon resonance of Bi-metallic core-shell nanoparticles on a dielectric substrate near an external tipen_US
dc.typeArticleen_US
dc.peerreviewedyesen_US
dc.publicationstatusPublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID(ORCID 0000-0001-5483-587X & YÖK ID 141825) Mengüç, Pınar
dc.contributor.ozuauthorMengüç, Mustafa Pınar
dc.identifier.volume241en_US
dc.identifier.wosWOS:000503314400008
dc.identifier.doi10.1016/j.jqsrt.2019.106684en_US
dc.subject.keywordsBimetallic nanoparticlesen_US
dc.subject.keywordsLocalized surface plasmon resonanceen_US
dc.subject.keywordsDiscrete dipole approximation with surface interactionsen_US
dc.subject.keywordsSensingen_US
dc.subject.keywordsLocalized heatingen_US
dc.identifier.scopusSCOPUS:2-s2.0-85074043653
dc.contributor.authorMale1
dc.relation.publicationcategoryArticle - International Refereed Journal - Institutional Academic Staff


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