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Proceedings Article

Sol-gel derived contamination resistant antireflective coatings

[+] Author Affiliations
Jun Shen, Guangming Wu, Bin Zhou, Zhihua Zhang, Yumei Zhu

Tongji Univ. (China)

Yuan Liu

Tongji Univ. (China) and Univ. of Shanghai for Science and Technology (China)

Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 79952U (February 17, 2011); doi:10.1117/12.888178
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From Conference Volume 7995

  • Seventh International Conference on Thin Film Physics and Applications
  • Junhao Chu; Zhanshan Wang
  • Shanghai, China | September 24, 2010

abstract

Silica-based sol-gel antireflective (AR) optical coatings are critical components for high peak power laser systems. It is well known that water vapor and volatile organic compounds in both the laser bay and target bay environments will reduce the antireflective efficiency and laser-damage resistance of the sol-gel AR coating. In this study, alkylation with organosilanes in the vapor state was investigated. Sol-gel AR coatings were vapor-phase treated with hexamethyldisilazane (HMDS) and trimethylchlorosilane (TMCS) at room temperature, and the resulting post-treated sol-gel AR coatings were tested for their resistance to contamination by a series of volatile organic compounds. Contact angle measurements were taken to discern the degree of silanization. After the vapor treatment of sol-gel AR coatings with organosilanes, the spectral performance of the coatings were analyzed by spectrophotometer, both before and after the exposure to volatile organic compounds. It is found that the coatings treated with ammonia and HMDS show a better contamination resistant capability. After being contaminated 70 hours with hexane, the transmittance of the coatings presents no obvious decrease. And the vapor treatment produces an increase in their damage threshold at 1064 nm (10ns pulse width) as compared to untreated control samples.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Jun Shen ; Yuan Liu ; Guangming Wu ; Bin Zhou ; Zhihua Zhang, et al.
"Sol-gel derived contamination resistant antireflective coatings", Proc. SPIE 7995, Seventh International Conference on Thin Film Physics and Applications, 79952U (February 17, 2011); doi:10.1117/12.888178; http://dx.doi.org/10.1117/12.888178


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