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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4056–4066

Enhanced transmittance and hydrophilicity of nanostructured glass substrates with antireflective properties using disordered gold nanopatterns

Jung Woo Leem, Yunhae Yeh, and Jae Su Yu  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 4056-4066 (2012)

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We fabricated surface nanostructures with different pillar and cone shapes on glass substrates using thermally dewetted gold (Au) nanoparticles as etch masks by dry etching. Their optical total transmittance characteristics, together with theoretical predictions using rigorous coupled-wave analysis simulation, and wetting behaviors were investigated. The nanostructured glass substrates strongly enhanced the surface transmission compared to the flat glass substrate. The glass nanocones with a linearly graded effective refractive index profile exhibited better transmission properties than the glass nanopillars due to the lower surface reflectance, thus leading to higher average transmittance with increasing their height. For the glass nanocones with a period of 106 ± 39 nm at the Au film thickness of 5 nm, the higher average total transmittance (Tave) and solar weighted transmittance (SWT) of ~95.5 and ~95.8% at wavelengths of 300-1100 nm and the lower contact angle (θc) of 31° were obtained compared to the flat glass substrate (i.e., Tave~92.7%, SWT~92.7%, and θc~65°). The calculated total transmittance results showed a similar tendency to the experimental results.

© 2012 OSA

OCIS Codes
(160.4760) Materials : Optical properties
(220.4241) Optical design and fabrication : Nanostructure fabrication
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:

Original Manuscript: December 19, 2011
Revised Manuscript: January 30, 2012
Manuscript Accepted: January 30, 2012
Published: February 2, 2012

Jung Woo Leem, Yunhae Yeh, and Jae Su Yu, "Enhanced transmittance and hydrophilicity of nanostructured glass substrates with antireflective properties using disordered gold nanopatterns," Opt. Express 20, 4056-4066 (2012)

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