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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 12 — Dec. 1, 2008

Biomimetic subwavelength antireflective gratings on GaAs

Chih-Hung Sun, Brian J. Ho, Bin Jiang, and Peng Jiang  »View Author Affiliations

Optics Letters, Vol. 33, Issue 19, pp. 2224-2226 (2008)

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We have developed a simple and scalable bottom-up approach for fabricating moth-eye antireflective coatings on GaAs substrates. Monolayer, non-close-packed silica colloidal crystals are created on crystalline GaAs wafers by a spin-coating-based single-layer reduction technique. These colloidal monolayers can be used as etching masks during a B Cl 3 dry-etch process to generate subwavelength-structured antireflective gratings directly on GaAs substrates. The gratings exhibit excellent broadband antireflective properties, and the specular reflection matches with the theoretical prediction using a rigorous coupled-wave analysis model. These bioinspired antireflection coatings have important technological applications ranging from efficient solar cells to IR detectors.

© 2008 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(310.1210) Thin films : Antireflection coatings
(220.4241) Optical design and fabrication : Nanostructure fabrication
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Thin Films

Original Manuscript: July 29, 2008
Manuscript Accepted: August 15, 2008
Published: September 29, 2008

Virtual Issues
Vol. 3, Iss. 12 Virtual Journal for Biomedical Optics

Chih-Hung Sun, Brian J. Ho, Bin Jiang, and Peng Jiang, "Biomimetic subwavelength antireflective gratings on GaAs," Opt. Lett. 33, 2224-2226 (2008)

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