Broadband antireflection coatings: simple analytical expressions to determine the optimal refractive indices of double-layer step-down designs
Year: 2026
Type: article
Abstract: Broadband antireflection coatings provide an effective solution to minimize light reflection over a broad wavelength range. Such broadband performance is commonly achieved using multilayer designs composed of more than two layers. However, the design of optimal coatings composed of as few as two layers remains scarcely explored: indeed, determining precisely the optimal refractive indices that the constituent layers shall ideally reach (down to the second decimal place) is still a challenging task. In this work, we propose a simple and precise analytical approach for designing double-layer coatings that achieve optimal antireflection performance across a broad spectral range.
Source: Optics Continuum
Authors: Huy Van Mai, Alexandre Jaffré, Emmanuel Blanc, David Alamarguy, Olivier Schneegans
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,372
OpenAlex ID: W7171961249