Special Section: Selected Papers from the 3rd Mediterranean Conference on Nanophotonics

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

[+] Author Affiliations
Jordi Sancho-Parramon, Vesna Janicki, Hrvoje Zorc

Ruder Boškovic Institute, Bijenicka cesta 54, Zagreb, 10000, Croatia

J. Nanophoton. 5(1), 051805 (May 13, 2011). doi:10.1117/1.3590238
History: Received January 28, 2011; Revised April 15, 2011; Accepted April 15, 2011; Published May 13, 2011; Online May 13, 2011
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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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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

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(1), 051805 (May 13, 2011). ; http://dx.doi.org/10.1117/1.3590238


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