Direct retrieval method of the effective permittivity and permeability of bulk semi-infinite metamaterials by variable-angle spectroscopic ellipsometry

Research output: Contribution to journalArticle

  • External authors:
  • Quentin Flamant
  • Daniel Torrent
  • Sergio Gomez-Grana
  • Vasyl G. Kravets
  • Philippe Barois
  • Virginie Ponsinet
  • Alexandre Baron

Abstract

In this work, we present a simple method for the direct retrieval of the effective
permittivity and permeability of a bulk semi-infinite metamaterial from variable-angle spectroscopic ellipsometry measurements. Starting from the well-known Fresnel equations, we derive an analytical expression in which unknown coefficients are fitted to the experimental data using a linear regression model. The effective permittivity and permeability are then determined by solving a simple system and the correct solution is selected based on physical criteria. As an example, the method is applied to the case of a self-assembled metamaterial exhibiting strong isotropic optical magnetism.

Bibliographical metadata

Original languageEnglish
Pages (from-to)1762-1772
JournalOSA CONTINUUM
Volume2
Issue number5
Early online date15 May 2019
DOIs
Publication statusPublished - 2019