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  4. Wideband antireflection coatings by combining interference multilayers with structured top layers
 
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2009
Journal Article
Title

Wideband antireflection coatings by combining interference multilayers with structured top layers

Abstract
The residual reflectance obtained for a broad wavelength range depends mainly on the refractive index of the last layer. Using interference layer stacks composed of naturally available low- and high-index materials, the residual reflection for a broad range cannot be adjusted below a certain limit. However, nanostructured (gradient) and porous layers are effective media with a refractive index lower than that of natural materials. Results demonstrate that an interference layer stack combined with a structured layer as the last layer yields better antireflection properties owing to the low effective index of the structure.
Author(s)
Schulz, U.
Journal
Optics Express  
Open Access
Link
Link
DOI
10.1364/OE.17.008704
Additional full text version
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Language
English
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF  
Keyword(s)
  • surface

  • performance

  • reflectance

  • design

  • film

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