ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/3157

Title: Influence of the surface roughness on the properties of Au films measured by surface plasmon resonance and x-ray reflectometry.
Authors: Velinov, T
Ahtapodov, L
Nelson, A
Gateshki, M
Bivolarska, M
Keywords: Evaporation
Optical Properties
Thin Films
Gold
Surface Properties
Plasmons
Issue Date: 31-Jan-2011
Publisher: Elsevier
Citation: Velinov, T., Ahtapodov, L., Nelson, A., Gateshki, M., Bivolarska, M. (2011). Influence of the surface roughness on the properties of Au films measured by surface plasmon resonance and x-ray reflectometry. Thin Solid Films, 519(7), 2093-2097.
Abstract: Thickness and refractive index of Au films thermally evaporated onto glass substrates and with an underlayer of Cr are determined from surface plasmon resonance. The results for the thickness are found to agree very well with those from X-ray reflectivity when a simple model of layers with flat interfaces is used. Plasmon propagation along thin films is influenced by radiative damping due to scattering from surface roughness. To study this influence the surface roughness of the glass substrate, Cr an Au layers are measured by X-ray reflectometry and the results used to introduce three intermediate layers with effective refractive indices and thicknesses corresponding to the roughness. Then Fresnel's equations are used to fit the reflectivity and to deduce the layer properties. It is found that the roughness affects to a great extent the optical parameters of the Au films even when it is smaller than 1 nm. In particular, the absolute value of real part of the dielectric constant decreases while its imaginary part increases when those effects are not taken into account. © 2011, Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.tsf.2010.10.059
http://apo.ansto.gov.au/dspace/handle/10238/3157
ISSN: 0040-6090
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback