On the applicability of discrete dipole approximation for plasmonic particles

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dc.contributor.author Vartia, Olli S.
dc.contributor.author Ylä-Oijala, Pasi
dc.contributor.author Markkanen, Johannes
dc.contributor.author Puupponen, Salla
dc.contributor.author Seppälä, Ari
dc.contributor.author Sihvola, Ari
dc.contributor.author Ala-Nissila, Tapio
dc.date.accessioned 2016-01-08T08:22:02Z
dc.date.available 2016-01-08T08:22:02Z
dc.date.issued 2016-01
dc.identifier.citation Vartia , O S , Ylä-Oijala , P , Markkanen , J , Puupponen , S , Seppälä , A , Sihvola , A & Ala-Nissila , T 2016 , ' On the applicability of discrete dipole approximation for plasmonic particles ' , Journal of Quantitative Spectroscopy & Radiative Transfer , vol. 169 , pp. 23-35 . https://doi.org/10.1016/j.jqsrt.2015.10.003
dc.identifier.other PURE: 56569184
dc.identifier.other PURE UUID: 037e7ab4-469a-47ae-b4f8-f5f06e279701
dc.identifier.other Scopus: 84946211818
dc.identifier.other WOS: 000366767400003
dc.identifier.other ORCID: /0000-0001-5989-3630/work/29576060
dc.identifier.uri http://hdl.handle.net/10138/159363
dc.description.abstract It has been recognized that the commonly used discrete dipole approximation (DDA) for calculating the optical properties of plasmonic materials may exhibit slow convergence for a certain region of the complex refractive index. In this work we investigate the quantitative accuracy of DDA for particles of different shapes, with silver as the plasmonic material. As expected, the accuracy and convergence of the method as a function of the number of dipoles is relatively good for solid spheres and rounded cubes whose size is of the same order as the wavelength of the localized surface plasmon resonance in silver. However, we find that for solid particles much smaller than the resonance wavelength, and for silver-silica core-shell particles in particular, DDA does not converge to the correct limit even for 10(6) dipoles. We also find that the slow convergence tends to be accompanied by strong, discretization dependent oscillations in the particle's internal electric field. We demonstrate that the main factor behind the slow convergence of the DDA is due to inaccuracies in the plasmonic resonances of the dipoles at the surface of the particles. (C) 2015 Elsevier Ltd. All rights reserved. en
dc.format.extent 13
dc.language.iso eng
dc.relation.ispartof Journal of Quantitative Spectroscopy & Radiative Transfer
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 114 Physical sciences
dc.title On the applicability of discrete dipole approximation for plasmonic particles en
dc.type Article
dc.contributor.organization Department of Physics
dc.contributor.organization Planetary-system research
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.jqsrt.2015.10.003
dc.relation.issn 0022-4073
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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