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Tuning the effective dielectric function of thin film metal-dielectric composites by controlling the deposition temperature
J. Nanophoton. 5, 051805 (May 13, 2011); http://dx.doi.org/10.1117/1.3590238
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Add to FacebookThe influence of the substrate temperature on the effective optical behavior of Ag-SiO2 composites obtained by electron beam evaporation was studied. Optical characterization of the composites was performed by means of spectroscopic ellipsometry measurements. The effective dielectric function of the composites, modeled using a multiple oscillator approach, could be widely tuned by controlling the deposition temperature. The spectral dependence of the composite absorption appeared to be better described with a Gaussian line shape than with the classical Lorentz oscillator model. The description of the effective dielectric function using standard effective medium theories failed and the experimental results could be explained only in the general framework of the Bergman spectral density theory.
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)
History
Received Jan 28, 2011
Accepted Apr 15, 2011
Revised Apr 15, 2011
Published online May 13, 2011
Accepted Apr 15, 2011
Revised Apr 15, 2011
Published online May 13, 2011
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Citation
Jordi Sancho-Parramon, Vesna Janicki and Hrvoje Zorc, "Tuning the effective dielectric function of thin film metal-dielectric composites by controlling the deposition temperature",
J. Nanophoton. 5, 051805 (May 13, 2011); http://dx.doi.org/10.1117/1.3590238
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