Open AccessBlack paints covered with multidielectrics: light absorbers
Author(s) -
Gabriel Soriano,
Myriam Zerrad,
Claude Amra
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.393903
Subject(s) - optics , light scattering , scattering , reflection (computer programming) , broadband , absorption (acoustics) , materials science , light reflection , physical optics , bidirectional reflectance distribution function , electromagnetic radiation , geometrical optics , mie scattering , forward scatter , physics , reflectivity , computer science , programming language
Black paints are commonly used to provide broadband light absorbers in high-precision optics. We show how multidielectric coatings improve the performances of these absorbers. The coated rough paints still exhibit a quasi-lambertian diffuse reflection, but this scattering pattern can be reduced by several orders of magnitude, which strongly enhances absorption. Predictions are based on an exact electromagnetic theory of light scattering from arbitrary rough multilayers. Results are also compared to useful approximate theories.