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  4. Combined 'moth-eye' structured and graded index-layer anti-reflecting coating for high index glasses
 
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2019
Journal Article
Titel

Combined 'moth-eye' structured and graded index-layer anti-reflecting coating for high index glasses

Abstract
We present a hybrid antireflective coating (ARC) providing a complete continuous graded refractive index (GRIN) transition from a high-index substrate down to ambient air. The ARC comprises a first GRIN layer of dense silicon-oxy-nitride with a varying, height adjusted material composition. Secondly, a layer of quasi-periodic nanopillars imitating AR-""moth-eye structure"" is added to the dense GRIN layer. Demonstrated on a high index glass with a refractive index of ne=1.73 the hybrid GRIN-ARC is applicable to a broad material selection and allows to eliminate any step-like transition up to a refractive index of the substrate of ∼2.0. The ARC offers antireflective properties for large incidence angles and over an extremely broad spectrum ranging from 400 nm up to 2.5 µm. Compared to the sole substrate, the hybrid GRIN-ARC results in an increase of transmittance of more than 10% in the maximum, and more than 6% in the peripheral regions of the spectrum.
Author(s)
Kraus, Matthias
University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07745 Jena, Germany
Diao, Zhaolu
Max Planck Institute for Medical Research, Jahnstraße 29, 69120 Heidelberg, Germany
Weishaupt, Klaus
Max Planck Institute for Medical Research, Jahnstraße 29, 69120 Heidelberg, Germany
Spatz, P. Joachim
Max Planck Institute for Medical Research, Jahnstraße 29, 69120 Heidelberg, Germany
Täschner, Kerstin
Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Bartzsch, Hagen orcid-logo
Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Schmittgens, Ralph
Leica Camera AG, Am Leitz-Park 5, 35578 Wetzlar, Germany
Brunner, Robert
University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07745 Jena, Germany
Zeitschrift
Optics Express
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
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DOI
10.1364/OE.27.034655
Externer Link
Externer Link
Language
English
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Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Tags
  • AR-coating

  • optical surface

  • light-emitting diode

  • transparent

  • surface

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