Local Surface Plasmon Resonance of metallic nanoparticles embedded in amorphous silicon

A. Fantoni, M. Fernandes, Y. Vigranenko, M. Vieira

Research output: Contribution to journalArticlepeer-review

Abstract

This work reports a theoretical study aimed to identify the plasmonic resonance condition for a system formed by metallic nanoparticles embedded in an a-Si:H matrix. The study is based on a Tauc-Lorentz model for the electrical permittivity of a-Si:H and a Drude model for the metallic nanoparticles and the polarizability of an aluminium sphereshaped particle with radius of 10-20 nm. We also performed FDTD simulations of light propagation inside this structure reporting about the effects caused by a single nanosphere of aluminium, silver and, as a comparison, an ideally perfectly conductor. The simulation results show that it is possible to obtain a plasmonic resonance in the red part of the spectrum (600-650 nm) when 10-20 nm radius aluminium spheres are embedded into a-Si:H.

Original languageEnglish
Pages (from-to)e146-e150
JournalCiencia e Tecnologia dos Materiais
Volume29
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • a-Si:H
  • aluminium
  • localized plasmonic surface resonance

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