We present a theoretical approach to the study of second- and third-harmonic generation from metallic structures and nanocavities filled with a nonlinear material in the ultrashort pulse regime. We model the metal as a two-component medium, using the hydrodynamic model to describe free electrons and Lorentz oscillators to account for core electron contributions to both the linear dielectric constant and harmonic generation. The active nonlinear medium that may fill a metallic nanocavity, or be positioned between metallic layers in a stack, is also modeled using Lorentz oscillators and surface phenomena due to symmetry breaking are taken into account. We study the effects of incident TE- and TM-polarized fields and show that a simple reexamination of the basic equations reveals additional, exploitable dynamical features of nonlinear frequency conversion in plasmonic nanostructures.

Second- and third-harmonic generation in metal-based structures / M., Scalora; M. A., Vincenti; D., De Ceglia; V., Roppo; Centini, Marco; N., Akozbek; M. J., Bloemer. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 82:4(2010), p. 043828. [10.1103/physreva.82.043828]

Second- and third-harmonic generation in metal-based structures

CENTINI, MARCO;
2010

Abstract

We present a theoretical approach to the study of second- and third-harmonic generation from metallic structures and nanocavities filled with a nonlinear material in the ultrashort pulse regime. We model the metal as a two-component medium, using the hydrodynamic model to describe free electrons and Lorentz oscillators to account for core electron contributions to both the linear dielectric constant and harmonic generation. The active nonlinear medium that may fill a metallic nanocavity, or be positioned between metallic layers in a stack, is also modeled using Lorentz oscillators and surface phenomena due to symmetry breaking are taken into account. We study the effects of incident TE- and TM-polarized fields and show that a simple reexamination of the basic equations reveals additional, exploitable dynamical features of nonlinear frequency conversion in plasmonic nanostructures.
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Second- and third-harmonic generation in metal-based structures / M., Scalora; M. A., Vincenti; D., De Ceglia; V., Roppo; Centini, Marco; N., Akozbek; M. J., Bloemer. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 82:4(2010), p. 043828. [10.1103/physreva.82.043828]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/140925
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