``Black'' Titania Coatings Composed of Sol-Gel Imprinted Mie Resonators Arrays - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Advanced Functional Materials Année : 2017

``Black'' Titania Coatings Composed of Sol-Gel Imprinted Mie Resonators Arrays

Résumé

Optical technologies and devices rely on the controlled manipulation of light propagation through a medium. This is generally governed by the inherent effective refractive index of the material as well as by its structure and dimensionality. Although a precise control over light propagation with subwavelength size objects is a crucial issue for a plethora of applications, the widely used fabrication methods remain cumbersome and expensive. Here, a sol-gel dip-coating method combined with nanoimprinting lithography on arbitrary glass and silicon substrates is implemented for the fabrication of TiO2-based dielectric Mie resonators. The technique allows obtaining submicrometric pillars featuring unprecedented vertical aspect ratios (> 1) with relatively high fidelity and precision. Spectroscopic characterization at visible and near-infrared frequencies demonstrate that the resonant properties of these dielectric pillar arrays allow for a drastic reduction of light transmission (cutting more than 50% on glass) and reduced reflection (reflecting less than 3% on glass and 16% on bulk silicon), accounting for an efficient light trapping. These results provide a guideline for the fabrication of Mie resonators using a fast, versatile, low-cost, low-temperature technique for efficient light manipulation at the nanoscale.
Fichier non déposé

Dates et versions

hal-01694465 , version 1 (27-01-2018)

Identifiants

Citer

Thomas Bottein, Thomas Wood, Thomas David, Jean Benoit Claude, Luc Favre, et al.. ``Black'' Titania Coatings Composed of Sol-Gel Imprinted Mie Resonators Arrays. Advanced Functional Materials, 2017, 27 (2), ⟨10.1002/adfm.201604924⟩. ⟨hal-01694465⟩
75 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More