Tuning the effective dielectric function of thin film metal-dielectric composites by controlling the deposition temperature

Jordi Sancho-Parramon; Vesna Janicki; Hrvoje Zorc

doi:10.1117/1.3590238

1 January 2011 Tuning the effective dielectric function of thin film metal-dielectric composites by controlling the deposition temperature

Jordi Sancho-Parramon, Vesna Janicki, Hrvoje Zorc

Author Affiliations +

Journal of Nanophotonics, Vol. 5, Issue 1, 051805 (January 2011). https://doi.org/10.1117/1.3590238

Abstract

The 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.

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Jordi Sancho-Parramon, Vesna Janicki, and Hrvoje Zorc "Tuning the effective dielectric function of thin film metal-dielectric composites by controlling the deposition temperature," Journal of Nanophotonics 5(1), 051805 (1 January 2011). https://doi.org/10.1117/1.3590238

Published: 1 January 2011

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