Preprint Article Version 1 This version is not peer-reviewed

Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with RCWA

Version 1 : Received: 5 February 2018 / Approved: 5 February 2018 / Online: 5 February 2018 (15:33:12 CET)

How to cite: Nadal, E.; Barros, N.; Glénat, H.; Kachkachi, H. Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with RCWA. Preprints 2018, 2018020039 (doi: 10.20944/preprints201802.0039.v1). Nadal, E.; Barros, N.; Glénat, H.; Kachkachi, H. Optical Properties of Complex Plasmonic Materials Studied with Extended Effective Medium Theories Combined with RCWA. Preprints 2018, 2018020039 (doi: 10.20944/preprints201802.0039.v1).

Abstract

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 give us entails about their inner structure. Such approach could be a simple and efficient tool to study complex micro-structured system based on plasmonic components, such as metamaterials.

Subject Areas

Gold nanoparticles, plasmon, nanocomposites, laser interferometry, Maxwell-Garnett theory, gratings, diffraction, RCWA.

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