Molding of Plasmonic Resonances in Metallic Nanostructures: Dependence of the Non-Linear Electric Permittivity on System Size and Temperature.

Materials (Basel) 2013 Oct 25;6(11):4879-4910. Epub 2013 Oct 25.

Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.

In this paper, we review the principal theoretical models through which the dielectric function of metals can be described. Starting from the Drude assumptions for intraband transitions, we show how this model can be improved by including interband absorption and temperature effect in the damping coefficients. Electronic scattering processes are described and included in the dielectric function, showing their role in determining plasmon lifetime at resonance. Relationships among permittivity, electric conductivity and refractive index are examined. Finally, a temperature dependent permittivity model is presented and is employed to predict temperature and non-linear field intensity dependence on commonly used plasmonic geometries, such as nanospheres.

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Source
http://www.mdpi.com/1996-1944/6/11/4879
Publisher Site
http://dx.doi.org/10.3390/ma6114879DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5452772PMC
October 2013
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