Terahertz time-domain spectroscopy of absorbing materials and of metamaterials
Résumé
This paper gives a review of recent works we performed in view of characterizing natural materials and metamaterials by terahertz time-domain spectroscopy. We address materials that exhibit a low transmittance in given narrow spectral bands or over the whole experimental spectral window. We give rules to select the most adapted technique for a precise characterization of the sample, i.e. for determining with the best precision the refractive index as well as the coefficient of absorption of the material of the tested sample. The procedures are validated and illustrated by examples of characterization of materials like maltose and DAST, and of fishnet metamaterials that exhibit a left-handed character or a chiral behaviour.
Domaines
Electromagnétisme
Origine : Fichiers produits par l'(les) auteur(s)
