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Spectral Density Analysis of Thin Gold Films: Thickness and Structure Dependence of the Optical Properties
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
3M Austin Center, EEBG/CRML, Austin, Texas, USA.
Dept. Physics, Chemistry and Biology, Linköping University.
Dept. Physics, Chemistry and Biology, Linköping University.
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2013 (English)In: PIERS 2013 Stockholm: Progress in Electromagnetics Research Symposium Proceedings,, Cambridge, MA: The Electromagnetics Academy , 2013, 443-447 p.Conference paper, Published paper (Refereed)
Abstract [en]

Abstract| In this paper we study the feasibility of representing the optical properties ofultrathin gold films by effective medium theories. Gold films with mass thicknesses in the range of 1.4 to 9.2 nm were deposited by DC magnetron sputtering onto non-heated glass substrates.Optical measurements in the range 0.25 to 2 μm were carried out by spectroscopic ellipsometry, and the effective complex dielectric function of each film was determined. The gold films were modelled as a mixture of gold and air, and a general effective medium description using the spectral density function (SDF) was used to describe their optical properties. Numerical inversion of the experimental dielectric function gave a broad and rather featureless SDF, with a few superimposed peaks, both for island structures and percolating films. The broad background is qualitatively similar to predictions of the Bruggeman model [14].

Place, publisher, year, edition, pages
Cambridge, MA: The Electromagnetics Academy , 2013. 443-447 p.
National Category
Condensed Matter Physics Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-212441OAI: oai:DiVA.org:uu-212441DiVA: diva2:677775
Conference
Progress in Electromagnetics Research Symposium, August 12-15, 2013, Stockholm, Sweden
Available from: 2013-12-10 Created: 2013-12-10 Last updated: 2016-04-21

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Lansåker, PiaValyukh, IrinaGranqvist, Claes-GöranNiklasson, Gunnar A.

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