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Open AccessFeature PaperArticle

Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with Rigorous Coupled Wave Analysis

1
University of Perpignan Via Domitia (UPVD), 52 Avenue Paul Alduy, 66100 Perpignan, France
2
Processes, Materials, and Solar Energy Laboratory, CNRS (PROMES-CNRS, UPR 8521), Rambla de la Thermodynamique, 66100 Perpignan, France
*
Author to whom correspondence should be addressed.
Materials 2018, 11(3), 351; https://doi.org/10.3390/ma11030351
Received: 5 February 2018 / Revised: 20 February 2018 / Accepted: 22 February 2018 / Published: 27 February 2018
In this study we fabricate gold nanocomposites and model their optical properties. The nanocomposites are either homogeneous films or gratings containing gold nanoparticles embedded in a polymer matrix. The samples are fabricated using a recently developed technique making use of laser interferometry. The gratings present original plasmon-enhanced diffraction properties. In this work, we develop a new approach to model the optical properties of our composites. We combine the extended Maxwell–Garnett model of effective media with the Rigorous Coupled Wave Analysis (RCWA) method and compute both the absorption spectra and the diffraction efficiency spectra of the gratings. We show that such a semi-analytical approach allows us to reproduce the original plasmonic features of the composites and can provide us with details about their inner structure. Such an approach, considering reasonably high particle concentrations, could be a simple and efficient tool to study complex micro-structured system based on plasmonic components, such as metamaterials. View Full-Text
Keywords: gold nanoparticles; plasmon; nanocomposites; laser interferometry; Maxwell–Garnett theory; gratings; diffraction; RCWA gold nanoparticles; plasmon; nanocomposites; laser interferometry; Maxwell–Garnett theory; gratings; diffraction; RCWA
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MDPI and ACS Style

Nadal, E.; Barros, N.; Glénat, H.; Kachakachi, H. Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with Rigorous Coupled Wave Analysis. Materials 2018, 11, 351.

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