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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 7 — Jul. 1, 2012
  • pp: 969–977

Visible and near infrared, wide-angle, anti-reflection coatings with self-cleaning on glass

Kelly Cristine Camargo, Alexandre Fassini Michels, Fabiano Severo Rodembusch, Matheus Francioni Kuhn, and Flavio Horowitz  »View Author Affiliations


Optical Materials Express, Vol. 2, Issue 7, pp. 969-977 (2012)
http://dx.doi.org/10.1364/OME.2.000969


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Abstract

In this work self-cleaning and transparent surfaces were produced on glass surface with simultaneous wide-angle and good optical transmittance on the visible region. These properties are pursued by combination of multi-scale surface topology based on silica nanoparticles (SNPs), index grading and interference coating, as well as polytetrafluoroethylene (PTFE) self-assembly, using two approaches. In the first, two-layer approach (glass/SNPs/PTFE), the resulting samples presented a water contact angle (WCA) of 169° ± 2° with very low hysteresis, as well as significant antireflection. The second, three-layer approach (glass/SNPs/silica aerogel/PTFE), produced surfaces with WCA of 158° ± 2° with also very low hysteresis (<5°), in addition to normal transmittance of 99% or higher, which decreased less than 2% at 20° incidence. These results show that proper structure-coated glass, with a combination of interference and graded-index effects, may provide simultaneous wide-angle antireflection and self-cleaning properties.

© 2012 OSA

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(310.1210) Thin films : Antireflection coatings

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: May 17, 2012
Revised Manuscript: June 14, 2012
Manuscript Accepted: June 19, 2012
Published: June 22, 2012

Citation
Kelly Cristine Camargo, Alexandre Fassini Michels, Fabiano Severo Rodembusch, Matheus Francioni Kuhn, and Flavio Horowitz, "Visible and near infrared, wide-angle, anti-reflection coatings with self-cleaning on glass," Opt. Mater. Express 2, 969-977 (2012)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-2-7-969


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