15 September 2005 Inverse opal photonic crystals with photonic band gaps in the visible and near-infrared
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Colloidal silica spheres with 200nm, 250nm, and 290nm diameters were self-assembled with single crystal crystallites 4-5mm wide and 10-15mm long. Larger spheres with diameters between 1000-2300nm were self-assembled with single crystal crystallites up to 1.5mm wide and 2mm long. The silica opals self-assembled vertically along the [100] direction of the face centered cubic lattice resulting in self-templated opals. Inverse opal photonic crystals with a partial band gap possessing a maximum in the near infrared at 3.8μm were constructed from opal templates composed of 2300nm diameter spheres with chalcogenide Ge33As12Se55 (AMTIR-1), a transparent glass in the near infrared with high refractive index. Inverse gold and gold/ polypropylene composite photonic crystals were fabricated from synthetic opal templates composed of 200-290nm silica spheres. The reflectance spectra and electrical conductance of the resulting structures is presented. Gold was infiltrated into opal templates as gold chloride and heat converted to metallic gold. Opals partially infiltrated with gold were co-infiltrated with polypropylene plastic for mechanical support prior to removal of the silica template with hydrofluoric acid.
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Brandon C. Jarvis, Brandon C. Jarvis, Cody L. Gilleland, Cody L. Gilleland, Tim Renfro, Tim Renfro, Jose M. Gutierrez, Jose M. Gutierrez, Kunjal Parikh, Kunjal Parikh, Robert Glosser, Robert Glosser, Preston B. Landon, Preston B. Landon, } "Inverse opal photonic crystals with photonic band gaps in the visible and near-infrared", Proc. SPIE 5924, Complex Mediums VI: Light and Complexity, 592414 (15 September 2005); doi: 10.1117/12.616871; https://doi.org/10.1117/12.616871


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