dc.contributor.authorLi, X. D.
dc.contributor.authorChen, T. P.
dc.contributor.authorLiu, Y.
dc.contributor.authorLeong, K. C.
dc.date.accessioned2014-04-01T08:10:18Z
dc.date.available2014-04-01T08:10:18Z
dc.date.copyright2014en_US
dc.date.issued2014
dc.identifier.citationLi, X. D., Chen, T. P., Liu, Y., & Leong, K. C. (2014). Influence of localized surface plasmon resonance and free electrons on the optical properties of ultrathin Au films: a study of the aggregation effect. Optics Express, 22(5), 5124-5132.en_US
dc.identifier.issn1094-4087en_US
dc.identifier.urihttp://hdl.handle.net/10220/19068
dc.description.abstractThe contributions of localized surface plasmon resonance (LSPR) and Drude (free electrons) absorption to the complex dielectric function of ultrathin Au films were investigated with spectroscopic ellipsometry. When the Au film thickness is thinner than ~10 nm, Au nanoparticles (NPs) are formed as a result of the discontinuity in the films, leading to the emergence of LSPR of Au NPs; and the LSPR exhibits a splitting when the films thinner than ~8 nm, which could be attributed to the near-field coupling of the Au NPs and/or the inhomogeneous polarizations of the Au NPs. On the other hand, the delocalization of electrons in Au NPs due to the aggregation of Au NPs in a thicker film leads to an increase in the free-electron absorption and a suppression of the LSPR.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesOptics expressen_US
dc.rights© 2014 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: [http://dx.doi.org/10.1364/OE.22.005124].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineering
dc.titleInfluence of localized surface plasmon resonance and free electrons on the optical properties of ultrathin Au films : a study of the aggregation effecten_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.identifier.doihttp://dx.doi.org/10.1364/OE.22.005124
dc.description.versionPublished versionen_US


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