Synthesis and optical properties of opal and inverse opal photonic crystals |
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| Affiliation: | 1. Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8QQ, Scotland, UK;2. Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, Scotland, UK;1. School of Electronic and Information Engineering, Heibei University of Technology, Tianjin 300401, China;2. School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China;3. School of Science, Tianjin Chengjian University, Tianjin 300384, China;1. Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran;2. Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran;3. Photonics Group, Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran |
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| Abstract: | We describe the synthesis of two complementary photonic crystals: opal and an inverted opal structure consisting of air spheres in a titania matrix. From optical measurements and comparison with the literature, the mechanical strength and effective refractive index are increased by sintering for opal and because of compression for the inverse opal. However, this is at the expense of reducing the PBG in the [1 1 1] direction. |
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