Electrostatic resonances of a negative-permittivity hemisphere

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Kettunen, Henrik
dc.contributor.author Wallén, Henrik
dc.contributor.author Sihvola, Ari
dc.date.accessioned 2015-04-20T09:00:35Z
dc.date.available 2015-04-20T09:00:35Z
dc.date.issued 2008
dc.identifier.citation Kettunen, Henrik & Wallén, Henrik & Sihvola, Ari. 2008. Electrostatic resonances of a negative-permittivity hemisphere. Journal of Applied Physics. Volume 103, Issue 9. 094112/1-8. 0021-8979 (printed). DOI: 10.1063/1.2917402. en
dc.identifier.issn 0021-8979 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/15696
dc.description.abstract This article studies the electric response of an electrically small hemispherical object with negative permittivity by computing its polarizability which is determined by two orthogonal components, the axial one and the transverse one. A certain range of negative permittivity values is found where the mathematical determination of the polarizability becomes impossible due to an unlimited number of singularities. These singularities are due to surface plasmons, also referred to as electrostatic resonances, caused by the sharp edge of the hemisphere. It is also found that the planar surface of the hemisphere may support resonant surface modes. Furthermore, there exists a dipolar resonance determined by the overall geometry. In addition, it is shown that the resonances can be smoothened by introducing losses and, even more importantly, rounding the edge. en
dc.format.extent 094112/1-8
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.ispartofseries Journal of Applied Physics en
dc.relation.ispartofseries Volume 103, Issue 9
dc.rights © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. http://scitation.aip.org/content/aip/journal/jap en
dc.subject.other Electrical engineering en
dc.title Electrostatic resonances of a negative-permittivity hemisphere en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Institute of Physics
dc.contributor.school Sähkötekniikan korkeakoulu fi
dc.contributor.school School of Electrical Engineering en
dc.contributor.department Radiotieteen ja -tekniikan laitos fi
dc.contributor.department Department of Radio Science and Engineering en
dc.subject.keyword dielectric polarization en
dc.subject.keyword surface plasmons en
dc.subject.keyword metamaterials en
dc.subject.keyword electromagnetic theory en
dc.identifier.urn URN:NBN:fi:aalto-201504202352
dc.type.dcmitype text en
dc.identifier.doi 10.1063/1.2917402
dc.type.version Final published version en

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