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Simulation of optical properties of layered metallic nanoparticles embedded inside dielectric matrices: Interference method or Maxwell Garnett effective-medium theory?

TitoloSimulation of optical properties of layered metallic nanoparticles embedded inside dielectric matrices: Interference method or Maxwell Garnett effective-medium theory?
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2010
AutoriProtopapa, Maria Lucia
RivistaApplied Optics
Volume49
Paginazione3014-3024
ISSN1559128X
Parole chiaveCeramic matrix, Composite films, Dielectric constants, Dielectric materials, Dielectric matrixes, Effective-medium theories, Interference methods, Layered systems, Maxwell equations, Maxwell-Garnett, Medium material, Metal nanoparticles, Metallic matrix composites, Metallic nanoparticles, Multilayer stacks, Multilayers, Nanoparticles, Optical characterization, Optical films, Optical multilayers, Optical performance, Optical properties, Optical response, Permittivity, Single layer, Transmittance spectra, Uniform distribution
Abstract

Optical characterization of composite films consisting of a ceramic matrix with embedded layered metal nanoparticles have recently received increasing interest. In particular, two methods have been mainly proposed in order to obtain optical performances of dielectric matrices containing layered nanoclusters (NCs): the first method is based on the simulation of the layered system as composed of alternated films of dielectric material and effective-medium material. Therefore, the optical response of the multilayer stack is calculated, assigning to the effective-medium layers the dielectric constant εYamaf, obtained by the Yamaguchi theory, and calculating the interference between the beams reflected and refracted at each interface inside the stack. The second method considers the multilayer stack as a single-layer effectivemedium film whose dielectric constant is calculated by the Maxwell Garnett (MG) theory. In particular, this second method is recognized to be valid in the case of nanoparticles uniformly distributed inside a dielectric matrix. The present study shows that the interference method, as it has been applied up to now, does not allow reproducing reflectance and transmittance spectra calculated by the MG theory in the case of a uniform distribution of NCs. © 2010 Optical Society of America.

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cited By 3

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77955990578&doi=10.1364%2fAO.49.003014&partnerID=40&md5=430ccf09a274b7bd713801e019c5fb0e
DOI10.1364/AO.49.003014
Citation KeyProtopapa20103014