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Photonic bandgaps of conformally coated structures
Journal of the Optical Society of America B
  • Rana Biswas, Iowa State University
  • Jinho Ahn, Hanyang University
  • Taoho Lee, Hanyang University
  • Jae-Hwang Lee, Iowa State University
  • Yong-Sung Kim, Iowa State University
  • Chang-Hwan Kim, Iowa State University
  • Wai Y. Leung, Iowa State University
  • Cha-Hwan Oh, Hanyang University
  • Kristen P. Constant, Iowa State University
  • Kai-Ming Ho, Iowa State University
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Polymeric molds of the layer-by-layer photonic crystal can be economically synthesized with a microtransfer molding technique. The refractive indices of these molds are low, preventing formation of a photonic bandgap. We find that such molds can be conformally coated with higher-index material. Photonic band calculations find structures in which conformally coated layer-by-layer molds have complete bandgaps for both titania and silicon coatings. Large stop bands exist in the 001 stacking direction. Feasibility of experimental conformal coating of the molds has been demonstrated with a titania-coated polyurethane mold, which shows optical features in agreement with simulations of reflection and transmission.

This article is from Journal of the Optical Society of America B 22 (2005): 2728–2733, doi:10.1364/JOSAB.22.002728. Posted with permission.

This paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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Optical Society of America
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Rana Biswas, Jinho Ahn, Taoho Lee, Jae-Hwang Lee, et al.. "Photonic bandgaps of conformally coated structures" Journal of the Optical Society of America B Vol. 22 Iss. 12 (2005) p. 2728 - 2733
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